CVE-2026-23490
pyasn1 - security update
7.5
HIGH
CVSS 3.1
EPSS 0.03%
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.
How to fix CVE-2026-23490
To remediate CVE-2026-23490, upgrade the affected package to a fixed version below.
- Debian/pyasn1—upgrade to 0.4.8-1+deb11u1 or later
- —upgrade to 0.4.8-1+deb11u1 or later
- —upgrade to 0.4.8-3+deb12u1 or later
- —upgrade to 0.6.2 or later
Is CVE-2026-23490 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 0.4.8-1+deb11u1
- from 0, < 0.4.8-1+deb11u1
- from 0, < 0.4.8-3+deb12u1
- >= 0.6.1, < 0.6.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |