CVE-2026-23490
pyasn1 has a DoS vulnerability in decoder
HIGH 7.5EPSS 0.8%
pyasn1 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.
- Affected
- pyasn1
- CVSS v3.1 CNA
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.76% chance of exploitation in the next 30 days, 54th percentile
- Published
- 2026-01-16
- Updated
- 2026-09-17
Proof-of-concept exploits (1)
Security advisories
- pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
- https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
- pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970