CVE-2026-33895
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | node-forge | < 1.4.0 | 1.4.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Digitalbazaar | Forge | through 1.3.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://datatracker.ietf.org/doc/html/rfc8032#section-8.4
- https://github.com/digitalbazaar/forge/commit/bdecf11571c9f1a487cc0fe72fe78ff6dfa96b85
- https://github.com/digitalbazaar/forge/security/advisories/GHSA-q67f-28xg-22rw
- https://access.redhat.com/errata/RHSA-2026:13826
- https://access.redhat.com/errata/RHSA-2026:24761
- https://access.redhat.com/errata/RHSA-2026:34342
- https://access.redhat.com/errata/RHSA-2026:9742
- https://access.redhat.com/security/cve/CVE-2026-33895
- https://bugzilla.redhat.com/show_bug.cgi?id=2452457
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33895.json
- https://github.com/advisories/GHSA-q67f-28xg-22rw
- https://nvd.nist.gov/vuln/detail/CVE-2022-35961
- https://nvd.nist.gov/vuln/detail/CVE-2026-25793
- https://nvd.nist.gov/vuln/detail/CVE-2026-33895