CVE-2026-23490

HIGH EPSS 38.5%
Published Jan 16, 20265mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jan 16, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
38.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-770

Affected Products 2

VendorProductVersionRange
pyasn1pyasn1* <0.6.2
debiandebian_linux11.0any

References 4

  • github.com https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
    Patch
  • github.com https://github.com/pyasn1/pyasn1/releases/tag/v0.6.2
    ProductRelease Notes
  • github.com https://github.com/pyasn1/pyasn1/security/advisories/GHSA-63vm-454h-vhhq
    Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2026/02/msg00002.html
    Vendor Advisory

Remediation

  • github.com https://github.com/pyasn1/pyasn1/commit/3908f144229eed4df24bd569d16e5991ace44970
    Patch