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High 7.5Published Jan 16, 2026
CVE-2026-23490pyasn1 is a generic ASN.1 library for Python.
Updated under an hour ago ()
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Sep 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
pyasn1 pyasn1 pyasn1:pyasn1 | before 0.6.2 | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970patch
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2product, release-notes
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhqvendor-advisory
- https://lists.debian.org/debian-lts-announce/2026/02/msg00002.htmlvendor-advisory
- https://access.redhat.com/errata/RHSA-2026:13508
- https://access.redhat.com/errata/RHSA-2026:13512
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:13553
- https://access.redhat.com/errata/RHSA-2026:14020
- https://access.redhat.com/errata/RHSA-2026:17446
- https://access.redhat.com/errata/RHSA-2026:17595
- https://access.redhat.com/errata/RHSA-2026:17611
- https://access.redhat.com/errata/RHSA-2026:1903
- https://access.redhat.com/errata/RHSA-2026:1904
- https://access.redhat.com/errata/RHSA-2026:1905
- https://access.redhat.com/errata/RHSA-2026:1906
- https://access.redhat.com/errata/RHSA-2026:19712
- https://access.redhat.com/errata/RHSA-2026:2221
- https://access.redhat.com/errata/RHSA-2026:2299
- https://access.redhat.com/errata/RHSA-2026:2300
- https://access.redhat.com/errata/RHSA-2026:2302
- https://access.redhat.com/errata/RHSA-2026:2303
- https://access.redhat.com/errata/RHSA-2026:2309
- https://access.redhat.com/errata/RHSA-2026:24476
- https://access.redhat.com/errata/RHSA-2026:24483
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.