# CVE-2026-118780: Forge: verifyCertificateChain() removes trusted CA certificates with the same subject from the CA store

Status: published. Published: 2026-10-29. Updated: 2026-11-04.

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used pki.verifyCertificateChain(), pki.createCaStore(), duplicate subject names to process the relevant input or security decision. node-forge modified the CA store while trying certificates that shared a subject name during pki.verifyCertificateChain(). A failed chain verification could permanently remove trusted CA certificates from the store, causing later valid chains to fail and creating a persistent availability impact for applications that reused the store. This issue is fixed in version 1.4.1.

## Remediation

- fix: node-forge (npm): OSV reports a fixed version 1.4.1. Check the advisory for supported release branches. (source: OSV GHSA-4487-j8r4-4g2f) — https://github.com/advisories/GHSA-4487-j8r4-4g2f

## Affected products and versions

- digitalbazaar / forge: < 1.4.1 (affected). Source: CNA: GitHub_M
-  / node-forge (node-forge): ≥ 0; < 1.4.1 (affected, semver); OSV events: introduced 0; fixed 1.4.1. Source: OSV GHSA-4487-j8r4-4g2f

## Severity and prioritization

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: 0.17% as of 2026-11-03; percentile 6.63%

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

- Weaknesses: CWE-295, CWE-471

## Exploit evidence

- exploit: https://github.com/digitalbazaar/forge/security/advisories/GHSA-4487-j8r4-4g2f (ADP: CISA-ADP)

## References

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-4487-j8r4-4g2f (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/digitalbazaar/forge/commit/f6555609bd30f442fbfacd543155928ceccf98d0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/digitalbazaar/forge/releases/tag/v1.4.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-4487-j8r4-4g2f (ADP: CISA-ADP; exploit)

- https://github.com/advisories/GHSA-4487-j8r4-4g2f (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-4487-j8r4-4g2f (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-118780; retrieved 2026-11-04; source updated 2026-11-04

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-4487-j8r4-4g2f; retrieved 2026-11-04; source updated 2026-10-30

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-118780; retrieved 2026-11-04; source updated Not reported

Revision: be9918bd3e3582a1aa98eb82ea15916fd7f70247b518ce84270688c43cfdf2a1

Canonical: https://y2.dev/cve/CVE-2026-118780

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