CVE-2026-33895

01/תיאור (מקור, אנגלית)

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, Ed25519 signature verification accepts forged non-canonical signatures where the scalar S is not reduced modulo the group order (`S >= L`). A valid signature and its `S + L` variant both verify in forge, while Node.js `crypto.verify` (OpenSSL-backed) rejects the `S + L` variant, as defined by the specification. This class of signature malleability has been exploited in practice to bypass authentication and authorization logic (see CVE-2026-25793, CVE-2022-35961). Applications relying on signature uniqueness (i.e., dedup by signature bytes, replay tracking, signed-object canonicalization checks) may be bypassed. Version 1.4.0 patches the issue.

02/מוצרים מושפעים

digitalbazaar: forge

03/קישורים10

• github.com/digitalbazaar/forge/security/advisories/GHSA-q67f-2‮… Vendor Advisory
• github.com/digitalbazaar/forge/security/advisories/GHSA-q67f-2‮… Vendor Advisory
• github.com/digitalbazaar/forge/commit/bdecf11571c9f1a487cc0fe7‮… Patch
• datatracker.ietf.org/doc/html/rfc8032#section-8.4 Third Party Advisory
• access.redhat.com/errata/RHSA-2026:13826
• access.redhat.com/errata/RHSA-2026:24761
• access.redhat.com/errata/RHSA-2026:34342
• access.redhat.com/errata/RHSA-2026:9742
• access.redhat.com/security/cve/CVE-2026-33895
• bugzilla.redhat.com/show_bug.cgi?id=2452457