CVE-2026-23490: pyasn1 has a DoS vulnerability in decoder
(updated )
After reviewing pyasn1 v0.6.1 a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets.
References
- access.redhat.com/errata/RHSA-2026:13508
- access.redhat.com/errata/RHSA-2026:13512
- access.redhat.com/errata/RHSA-2026:13545
- access.redhat.com/errata/RHSA-2026:13553
- access.redhat.com/errata/RHSA-2026:14020
- access.redhat.com/errata/RHSA-2026:17446
- access.redhat.com/errata/RHSA-2026:17595
- access.redhat.com/errata/RHSA-2026:17611
- access.redhat.com/errata/RHSA-2026:1903
- access.redhat.com/errata/RHSA-2026:1904
- access.redhat.com/errata/RHSA-2026:1905
- access.redhat.com/errata/RHSA-2026:1906
- access.redhat.com/errata/RHSA-2026:19712
- access.redhat.com/errata/RHSA-2026:2221
- access.redhat.com/errata/RHSA-2026:2299
- access.redhat.com/errata/RHSA-2026:2300
- access.redhat.com/errata/RHSA-2026:2302
- access.redhat.com/errata/RHSA-2026:2303
- access.redhat.com/errata/RHSA-2026:2309
- access.redhat.com/errata/RHSA-2026:24476
- access.redhat.com/errata/RHSA-2026:24483
- access.redhat.com/errata/RHSA-2026:2453
- access.redhat.com/errata/RHSA-2026:2460
- access.redhat.com/errata/RHSA-2026:2483
- access.redhat.com/errata/RHSA-2026:2486
- access.redhat.com/errata/RHSA-2026:24866
- access.redhat.com/errata/RHSA-2026:24977
- access.redhat.com/errata/RHSA-2026:2712
- access.redhat.com/errata/RHSA-2026:2758
- access.redhat.com/errata/RHSA-2026:28042
- access.redhat.com/errata/RHSA-2026:30088
- access.redhat.com/errata/RHSA-2026:3354
- access.redhat.com/errata/RHSA-2026:3359
- access.redhat.com/errata/RHSA-2026:37275
- access.redhat.com/errata/RHSA-2026:3958
- access.redhat.com/errata/RHSA-2026:3959
- access.redhat.com/errata/RHSA-2026:39894
- access.redhat.com/errata/RHSA-2026:4138
- access.redhat.com/errata/RHSA-2026:4139
- access.redhat.com/errata/RHSA-2026:4140
- access.redhat.com/errata/RHSA-2026:4141
- access.redhat.com/errata/RHSA-2026:4142
- access.redhat.com/errata/RHSA-2026:4143
- access.redhat.com/errata/RHSA-2026:4144
- access.redhat.com/errata/RHSA-2026:4145
- access.redhat.com/errata/RHSA-2026:4146
- access.redhat.com/errata/RHSA-2026:4147
- access.redhat.com/errata/RHSA-2026:4148
- access.redhat.com/errata/RHSA-2026:41928
- access.redhat.com/errata/RHSA-2026:42644
- access.redhat.com/errata/RHSA-2026:4943
- access.redhat.com/errata/RHSA-2026:54757
- access.redhat.com/errata/RHSA-2026:5606
- access.redhat.com/security/cve/CVE-2026-23490
- bugzilla.redhat.com/show_bug.cgi?id=2430472
- github.com/advisories/GHSA-63vm-454h-vhhq
- github.com/pyasn1/pyasn1
- github.com/pyasn1/pyasn1/blob/0f07d7242a78ab4d129b26256d7474f7168cf536/pyasn1/codec/ber/decoder.py
- github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
- github.com/pyasn1/pyasn1/commit/be353d755f42ea36539b4f5053c652ddf56979a6
- github.com/pyasn1/pyasn1/releases/tag/v0.6.2
- github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
- github.com/pypa/advisory-database/tree/main/vulns/pyasn1/PYSEC-2026-1810.yaml
- lists.debian.org/debian-lts-announce/2026/02/msg00002.html
- nvd.nist.gov/vuln/detail/CVE-2026-23490
- pypi.org/project/pyasn1
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23490.json
Code Behaviors & Features
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