CVE-2026-23490
pyasn1 has a DoS vulnerability in decoder
At a glance
- Severity
- HIGH 7.5
- EPSS
- EPSS 0.76 % · percentile 55 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-63vm-454h-vhhq — pyasn1 has a DoS vulnerability in decoder
- PYSEC-2026-1810 — pyasn1 has a DoS vulnerability in decoder
European references
- ENISA EUVD · EUVD-2026-2865
- GCVE · GCVE-0-2026-23490
CERT-FR advisories
- CERTFR-2026-AVI-1378 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1291 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0901 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0736 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0667 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0209 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0199 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:pyasn1:pyasn1:*:*:*:*:*:python:*:*< 0.6.2cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| pyasn1 · pyasn1 | affected < 0.6.2 |
References
- https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
- https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
- https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
- https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
- https://access.redhat.com/security/cve/CVE-2026-23490
- https://bugzilla.redhat.com/show_bug.cgi?id=2430472
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23490.json
- https://access.redhat.com/errata/RHSA-2026:4148
- https://access.redhat.com/errata/RHSA-2026:2758
- https://access.redhat.com/errata/RHSA-2026:3959
- https://access.redhat.com/errata/RHSA-2026:13512
- https://access.redhat.com/errata/RHSA-2026:54757
- https://access.redhat.com/errata/RHSA-2026:28042
- https://access.redhat.com/errata/RHSA-2026:3958
- https://access.redhat.com/errata/RHSA-2026:13508
- https://access.redhat.com/errata/RHSA-2026:17595
- https://access.redhat.com/errata/RHSA-2026:17446
- https://access.redhat.com/errata/RHSA-2026:2309
- https://access.redhat.com/errata/RHSA-2026:4138
- https://access.redhat.com/errata/RHSA-2026:1905
- https://access.redhat.com/errata/RHSA-2026:3354
- https://access.redhat.com/errata/RHSA-2026:1906
- https://access.redhat.com/errata/RHSA-2026:4146
- https://access.redhat.com/errata/RHSA-2026:4145
- https://access.redhat.com/errata/RHSA-2026:2483
- https://access.redhat.com/errata/RHSA-2026:4147
- https://access.redhat.com/errata/RHSA-2026:2486
- https://access.redhat.com/errata/RHSA-2026:4144
- https://access.redhat.com/errata/RHSA-2026:2221
- https://access.redhat.com/errata/RHSA-2026:4139
- https://access.redhat.com/errata/RHSA-2026:2303
- https://access.redhat.com/errata/RHSA-2026:4140
- https://access.redhat.com/errata/RHSA-2026:2300
- https://access.redhat.com/errata/RHSA-2026:4142
- https://access.redhat.com/errata/RHSA-2026:2302
- https://access.redhat.com/errata/RHSA-2026:4143
- https://access.redhat.com/errata/RHSA-2026:2299
- https://access.redhat.com/errata/RHSA-2026:4141
- https://access.redhat.com/errata/RHSA-2026:1903
- https://access.redhat.com/errata/RHSA-2026:3359
- https://access.redhat.com/errata/RHSA-2026:1904
- https://access.redhat.com/errata/RHSA-2026:2712
- https://access.redhat.com/errata/RHSA-2026:2453
- https://access.redhat.com/errata/RHSA-2026:2460
- https://access.redhat.com/errata/RHSA-2026:30088
- https://access.redhat.com/errata/RHSA-2026:13553
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:24866
- https://access.redhat.com/errata/RHSA-2026:5606
- https://access.redhat.com/errata/RHSA-2026:17611
- +10 more
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |