# CVE-2026-125334: Forge: TLS client crash on a handshake record received without a session

Status: published. Published: 2026-11-10. Updated: 2026-11-14.

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.3, a forge.tls client can pass a handshake record to tls.handleHandshake() while the connection has no session, including after a close_notify alert, after the application calls close(), or before handshake() is called. The handler dereferences c.session.md5 before dispatching the message, causing a TypeError to propagate from connection.process(). A malicious server or on-path attacker can deliver the record, including after a reset when the connection uses no encryption, and terminate a Node.js process if the application does not catch the exception. forge.tls servers are not affected, and there is no confidentiality or integrity impact. This issue is fixed in version 1.4.3.

## Remediation

- fix: node-forge (npm): GitHub reports patched versions 1.4.3. Check the advisory for the affected release branch. (source: GitHub GHSA-j8rw-jp99-435v) — https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v
- fix: node-forge (npm): OSV reports a fixed version 1.4.3. Check the advisory for supported release branches. (source: OSV GHSA-j8rw-jp99-435v) — https://github.com/advisories/GHSA-j8rw-jp99-435v

## Affected products and versions

- digitalbazaar / forge: < 1.4.3 (affected). Source: CNA: GitHub_M
-  / node-forge (node-forge): <= 1.4.2 (affected, GitHub advisory range). Source: GitHub GHSA-j8rw-jp99-435v
-  / node-forge (node-forge): ≥ 0; < 1.4.3 (affected, semver); OSV events: introduced 0; fixed 1.4.3. Source: OSV GHSA-j8rw-jp99-435v

## Severity and prioritization

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: GitHub_M

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.28% as of 2026-11-13; percentile 20.88%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-476

## Exploit evidence

- exploit: https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v (ADP: CISA-ADP)

## References

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/digitalbazaar/forge/pull/1169 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/digitalbazaar/forge/commit/2cfaeb516cb3d4aff1c0569d39394df41c5cb17c (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/digitalbazaar/forge/releases/tag/v1.4.3 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v (ADP: CISA-ADP; exploit)

- https://github.com/digitalbazaar/forge/commit/2cfaeb516cb3d4aff1c0569d39394df41c5cb17c (security-advisories@github.com)

- https://github.com/digitalbazaar/forge/pull/1169 (security-advisories@github.com)

- https://github.com/digitalbazaar/forge/releases/tag/v1.4.3 (security-advisories@github.com)

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v (security-advisories@github.com)

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v (GitHub Security Advisories; advisory)

- https://github.com/advisories/GHSA-j8rw-jp99-435v (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-j8rw-jp99-435v (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-125334; retrieved 2026-11-14; source updated 2026-11-14

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-125334; retrieved 2026-11-11; source updated 2026-11-10

- GitHub Security Advisories: https://github.com/digitalbazaar/forge/security/advisories/GHSA-j8rw-jp99-435v; retrieved 2026-11-12; source updated 2026-11-10

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-j8rw-jp99-435v; retrieved 2026-11-14; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-125334; retrieved 2026-11-14; source updated Not reported

Revision: ac07fdc54ee58bbd9e8e25259e8feded36f586a01751a3201709e910d2c0a9b9

Canonical: https://y2.dev/cve/CVE-2026-125334

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