CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-23490
High (7.5). EPSS 0.8% chance of exploitation in the next 30 days. Fixed in pyasn1 0.6.2.
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.
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
- CWE
- CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- pyasn1:pyasn1
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-63vm-454h-vhhq | PyPI | pyasn1 | >=0.6.1 <0.6.2 | 0.6.2 |
| PYSEC-2026-1810 | PyPI | pyasn1 | >=0.6.1 <0.6.2 | 0.6.2 |
References
- https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
- https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
- https://access.redhat.com/errata/RHSA-2026:13508