CVE-2026-23490

NameCVE-2026-23490
Descriptionpyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1125753

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pyasn1 (PTS)bullseye0.4.8-1vulnerable
bookworm0.4.8-3vulnerable
forky, sid, trixie0.6.1-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pyasn1source(unstable)(unfixed)1125753

Notes

https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
Fixed by: https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970 (v0.6.2)
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