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Vulnerability details: VCID-pgh9-tvw4-23cz
Vulnerability ID VCID-pgh9-tvw4-23cz
Aliases CVE-2026-27979
GHSA-h27x-g6w4-24gq
Summary next.js: Next.js: Unbounded postponed resume buffering can lead to DoS
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-770 Allocation of Resources Without Limits or Throttling
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 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27979.json
epss 0.0002 https://api.first.org/data/v1/epss?cve=CVE-2026-27979
epss 0.0002 https://api.first.org/data/v1/epss?cve=CVE-2026-27979
epss 0.0002 https://api.first.org/data/v1/epss?cve=CVE-2026-27979
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-h27x-g6w4-24gq
cvssv4 6.9 https://github.com/vercel/next.js
generic_textual MODERATE https://github.com/vercel/next.js
cvssv4 6.9 https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1
generic_textual MODERATE https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1
ssvc Track https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1
cvssv4 6.9 https://github.com/vercel/next.js/releases/tag/v16.1.7
generic_textual MODERATE https://github.com/vercel/next.js/releases/tag/v16.1.7
ssvc Track https://github.com/vercel/next.js/releases/tag/v16.1.7
cvssv3.1_qr MODERATE https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq
cvssv4 6.9 https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq
generic_textual MODERATE https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq
ssvc Track https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq
cvssv4 6.9 https://nvd.nist.gov/vuln/detail/CVE-2026-27979
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-27979
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27979.json
https://api.first.org/data/v1/epss?cve=CVE-2026-27979
https://github.com/vercel/next.js
https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1
https://github.com/vercel/next.js/releases/tag/v16.1.7
https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq
https://nvd.nist.gov/vuln/detail/CVE-2026-27979
2448512 https://bugzilla.redhat.com/show_bug.cgi?id=2448512
GHSA-h27x-g6w4-24gq https://github.com/advisories/GHSA-h27x-g6w4-24gq
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27979.json
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:L/SC:N/SI:N/SA:N Found at https://github.com/vercel/next.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

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

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:L/SC:N/SI:N/SA:N Found at https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1
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

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-18T19:51:23Z/ Found at https://github.com/vercel/next.js/commit/c885d4825f800dd1e49ead37274dcd08cdd6f3f1
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/vercel/next.js/releases/tag/v16.1.7
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

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-18T19:51:23Z/ Found at https://github.com/vercel/next.js/releases/tag/v16.1.7
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq
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

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-18T19:51:23Z/ Found at https://github.com/vercel/next.js/security/advisories/GHSA-h27x-g6w4-24gq
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-27979
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

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.05844
EPSS Score 0.0002
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:33:22.683439+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27979.json 38.6.0