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Vulnerability details: VCID-sh96-bseb-kugd
Vulnerability ID VCID-sh96-bseb-kugd
Aliases CVE-2026-4601
GHSA-w8q8-93cx-6h7r
Summary Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-325 Missing Cryptographic Step
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
cvssv3 8.7 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4601.json
epss 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2026-4601
cvssv3.1 8.7 https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
cvssv3.1 8.7 https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
cvssv4 8.8 https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
cvssv4 9.4 https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
generic_textual HIGH https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
ssvc Track https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-w8q8-93cx-6h7r
cvssv3.1 8.7 https://github.com/kjur/jsrsasign
cvssv4 8.8 https://github.com/kjur/jsrsasign
generic_textual HIGH https://github.com/kjur/jsrsasign
cvssv3.1 8.7 https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
cvssv3.1 8.7 https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
cvssv4 8.8 https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
cvssv4 9.4 https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
generic_textual HIGH https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
ssvc Track https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
cvssv3.1 8.7 https://github.com/kjur/jsrsasign/pull/645
cvssv3.1 8.7 https://github.com/kjur/jsrsasign/pull/645
cvssv4 8.8 https://github.com/kjur/jsrsasign/pull/645
cvssv4 9.4 https://github.com/kjur/jsrsasign/pull/645
generic_textual HIGH https://github.com/kjur/jsrsasign/pull/645
ssvc Track https://github.com/kjur/jsrsasign/pull/645
cvssv3.1 8.7 https://nvd.nist.gov/vuln/detail/CVE-2026-4601
cvssv4 8.8 https://nvd.nist.gov/vuln/detail/CVE-2026-4601
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-4601
cvssv3.1 8.7 https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
cvssv3.1 8.7 https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
cvssv4 8.8 https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
cvssv4 9.4 https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
generic_textual HIGH https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
ssvc Track https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4601.json
https://api.first.org/data/v1/epss?cve=CVE-2026-4601
https://github.com/kjur/jsrsasign
https://nvd.nist.gov/vuln/detail/CVE-2026-4601
0710e392ec35de697ce11e4219c988ba2b5fe0eb https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
2450209 https://bugzilla.redhat.com/show_bug.cgi?id=2450209
645 https://github.com/kjur/jsrsasign/pull/645
93789fe6efe5519db9692d4ad1dad586 https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
GHSA-w8q8-93cx-6h7r https://github.com/advisories/GHSA-w8q8-93cx-6h7r
RHSA-2026:19375 https://access.redhat.com/errata/RHSA-2026:19375
RHSA-2026:19409 https://access.redhat.com/errata/RHSA-2026:19409
RHSA-2026:19410 https://access.redhat.com/errata/RHSA-2026:19410
RHSA-2026:6568 https://access.redhat.com/errata/RHSA-2026:6568
RHSA-2026:6720 https://access.redhat.com/errata/RHSA-2026:6720
RHSA-2026:6912 https://access.redhat.com/errata/RHSA-2026:6912
RHSA-2026:6926 https://access.redhat.com/errata/RHSA-2026:6926
SNYK-JS-JSRSASIGN-15370941 https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4601.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P Found at https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Found at https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
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)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
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)

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Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-23T14:41:01Z/ Found at https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Found at https://github.com/kjur/jsrsasign
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

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physical

low

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://github.com/kjur/jsrsasign
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)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Found at https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
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

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physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P Found at https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
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

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
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

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
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)

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Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-23T14:41:01Z/ Found at https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P Found at https://github.com/kjur/jsrsasign/pull/645
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Found at https://github.com/kjur/jsrsasign/pull/645
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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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://github.com/kjur/jsrsasign/pull/645
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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physical

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://github.com/kjur/jsrsasign/pull/645
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

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physical

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Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-23T14:41:01Z/ Found at https://github.com/kjur/jsrsasign/pull/645
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-4601
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

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physical

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unchanged

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://nvd.nist.gov/vuln/detail/CVE-2026-4601
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:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P Found at https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
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

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physical

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unchanged

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Found at https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
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

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unchanged

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
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

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passive

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P Found at https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
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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physical

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Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-23T14:41:01Z/ Found at https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941
Exploit Prediction Scoring System (EPSS)
Percentile 0.06903
EPSS Score 0.00024
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:46:25.550876+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/4xxx/CVE-2026-4601.json 38.6.0