# CVE-2026-125335: Forge: Ed25519 signature verification accepts small-order public keys

Status: published. Published: 2026-11-10. Updated: 2026-11-12.

Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.3, ed25519.verify() decodes a public key in crypto_sign_open() without rejecting small-order points or their non-canonical encodings. With S = 0 and a small-order R value, an attacker who can choose the public key can produce signatures that verify for many messages, or all messages with the identity key, without a private key. This can defeat proof-of-possession, attribution, non-repudiation, or deduplication checks that rely on a signature being bound to the message. Keys produced by normal Ed25519 key generation are not small-order, so applications that verify only trusted or internally generated public keys are not affected. This issue is fixed in version 1.4.3.

## Remediation

- fix: node-forge (npm): OSV reports a fixed version 1.4.3. Check the advisory for supported release branches. (source: OSV GHSA-6889-vf6x-f3g5) — https://github.com/advisories/GHSA-6889-vf6x-f3g5

## Affected products and versions

- digitalbazaar / forge: < 1.4.3 (affected). Source: CNA: GitHub_M
-  / node-forge (node-forge): ≥ 0; < 1.4.3 (affected, semver); OSV events: introduced 0; fixed 1.4.3. Source: OSV GHSA-6889-vf6x-f3g5

## 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:L/A:N; source: CNA: GitHub_M

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.20% as of 2026-11-12; percentile 10.34%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-347

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/digitalbazaar/forge/security/advisories/GHSA-6889-vf6x-f3g5 (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/1b77e6f20082d7484479303d0252d5f427651295 (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/commit/1b77e6f20082d7484479303d0252d5f427651295 (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-6889-vf6x-f3g5 (security-advisories@github.com)

- https://github.com/advisories/GHSA-6889-vf6x-f3g5 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-6889-vf6x-f3g5 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-125335; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-125335; retrieved 2026-11-11; source updated 2026-11-10

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-6889-vf6x-f3g5; retrieved 2026-11-12; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-125335; retrieved 2026-11-12; source updated Not reported

Revision: 2668d9104541435bee51a48076ca969b19dedfefb52449c9902f8b1bd65eeb93

Canonical: https://y2.dev/cve/CVE-2026-125335

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