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Vulnerability details: VCID-rcz8-m4t1-97ct
Vulnerability ID VCID-rcz8-m4t1-97ct
Aliases CVE-2025-12758
GHSA-vghf-hv5q-vc2g
Summary Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\uFE0F, \uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-792 Incomplete Filtering of One or More Instances of Special Elements
CWE-172 Encoding Error
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00112 https://api.first.org/data/v1/epss?cve=CVE-2025-12758
epss 0.00112 https://api.first.org/data/v1/epss?cve=CVE-2025-12758
cvssv3.1 7.5 http://seclists.org/fulldisclosure/2026/Jan/27
cvssv4 7.7 http://seclists.org/fulldisclosure/2026/Jan/27
generic_textual HIGH http://seclists.org/fulldisclosure/2026/Jan/27
cvssv3.1 7.5 https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
cvssv3.1 7.5 https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
cvssv4 7.7 https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
cvssv4 8.7 https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
generic_textual HIGH https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
ssvc Track https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-vghf-hv5q-vc2g
cvssv3.1 7.5 https://github.com/validatorjs/validator.js
cvssv4 7.7 https://github.com/validatorjs/validator.js
generic_textual HIGH https://github.com/validatorjs/validator.js
cvssv3.1 7.5 https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382
cvssv4 7.7 https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382
generic_textual HIGH https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382
cvssv3.1 7.5 https://github.com/validatorjs/validator.js/pull/2616
cvssv3.1 7.5 https://github.com/validatorjs/validator.js/pull/2616
cvssv4 7.7 https://github.com/validatorjs/validator.js/pull/2616
cvssv4 8.7 https://github.com/validatorjs/validator.js/pull/2616
generic_textual HIGH https://github.com/validatorjs/validator.js/pull/2616
ssvc Track https://github.com/validatorjs/validator.js/pull/2616
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2025-12758
cvssv4 7.7 https://nvd.nist.gov/vuln/detail/CVE-2025-12758
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2025-12758
cvssv3.1 7.5 https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
cvssv3.1 7.5 https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
cvssv4 7.7 https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
cvssv4 8.7 https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
generic_textual HIGH https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
ssvc Track https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2025-12758
http://seclists.org/fulldisclosure/2026/Jan/27
https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382
2616 https://github.com/validatorjs/validator.js/pull/2616
ad31208b25b9e3d1e2e35f1d4d72572e https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
CVE-2025-12758 https://nvd.nist.gov/vuln/detail/CVE-2025-12758
GHSA-vghf-hv5q-vc2g https://github.com/advisories/GHSA-vghf-hv5q-vc2g
SNYK-JS-VALIDATOR-13653476 https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at http://seclists.org/fulldisclosure/2026/Jan/27
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

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unchanged

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at http://seclists.org/fulldisclosure/2026/Jan/27
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P Found at https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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unchanged

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

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required

unchanged

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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present

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passive

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P Found at https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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present

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passive

active

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-03T16:27:54Z/ Found at https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/validatorjs/validator.js
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

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low

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at https://github.com/validatorjs/validator.js
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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none

present

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passive

active

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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none

required

unchanged

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

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none

passive

active

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/validatorjs/validator.js/pull/2616
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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required

unchanged

changed

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none

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low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P Found at https://github.com/validatorjs/validator.js/pull/2616
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at https://github.com/validatorjs/validator.js/pull/2616
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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present

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passive

active

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P Found at https://github.com/validatorjs/validator.js/pull/2616
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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passive

active

high

low

none

high

low

none

high

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-03T16:27:54Z/ Found at https://github.com/validatorjs/validator.js/pull/2616
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2025-12758
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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high

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required

unchanged

changed

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at https://nvd.nist.gov/vuln/detail/CVE-2025-12758
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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passive

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

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high

low

none

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low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P Found at https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Found at https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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present

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passive

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P Found at https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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present

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passive

active

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Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-12-03T16:27:54Z/ Found at https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
Exploit Prediction Scoring System (EPSS)
Percentile 0.29324
EPSS Score 0.00112
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T17:00:25.429633+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2025/12xxx/CVE-2025-12758.json 38.6.0