Description
node-forge through 1.4.0 fails to validate element count in nested DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification. Attackers can embed garbage bytes inside the DigestAlgorithm sequence to forge valid signatures for arbitrary messages using low-exponent RSA keys. This is an incomplete fix for CVE-2026-33894.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| digitalbazaar | forge | ≤ 1.4.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | node-node-forge | No fix yet | — |
| Ubuntu 20.04 LTS | node-node-forge | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | python-tensorboard | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | jitsucom-jitsu-console | 2.11.0-r42 | — |
| Wolfi rolling | kubeflow-centraldashboard | 2.0.0-r8 | — |
| Wolfi rolling | kubeflow-pipelines-frontend | 2.17.2-r17 | — |
| Wolfi rolling | opensearch-dashboards-3 | 3.9.0-r5 | — |
References
- GitHub Issue #1149 issue-tracking
- https://github.com/digitalbazaar/forge product
- https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js technical-description
- https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js technical-description
- GitHub Security Advisory (GHSA-ppp5-5v6c-4jwp) related
- VulnCheck Advisory: node-forge through 1.4.0 RSA PKCS#1 v1.5 Signature Forgery via Nested DigestAlgorithm Padding third-party-advisory