- What: A Denial-of-Service vulnerability was found in pyasn1 v0.6.1 due to memory exhaustion from malformed RELATIVE-OID.
- Impact: Systems using the vulnerable pyasn1 library may experience denial of service.
- Affected: pyasn1 v0.6.1
- Patch: Upgrade to pyasn1 v0.6.2 to resolve the vulnerability.
- CVE: CVE-2026-23490
After reviewing pyasn1 v0.6.1 a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. References github.com /advisories/GHSA-63vm-454h-vhhq github.com /pyasn1/pyasn1 github.com /pyasn1/pyasn1/blob/0f07d7242a78ab4d129b26256d7474f7168cf536/pyasn1/codec/ber/decoder.py github.com /pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970 github.com /pyasn1/pyasn1/commit/be353d755f42ea36539b4f5053c652ddf56979a6 github.com /pyasn1/pyasn1/releases/tag/v0.6.2 github.com /pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq lists.debian.org /debian-lts-announce/2026/02/msg00002.html nvd.nist.gov /vuln/detail/CVE-2026-23490 Code Behaviors & Features Detect and mitigate CVE-2026-23490 with GitLab Dependency Scanning Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →