CVE WatchJul 15, 2026

CVE-2026-23490

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

CVSS

7.5

High

EPSS

0.7%

p48

KEV

—

Exploit Today

0-100

Published: Jan 16, 2026 · Last modified: Jul 15, 2026 · CWE-770

EPSS · 30d

0.7%EPSS · 30 days0.7%

2026-06-302026-07-17

Technical 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.

Official references

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