pyasn1 is a generic ASN.1 library for Python. From 0.3.3 until 0.6.5, schemaless container decoding stores every decoded component's TagSet in a growing set even though only one-versus-multiple tag types must be distinguished. Attacker-controlled BER, CER, or DER input contains many distinct long tag IDs whose TagSet hashes collide. Each later set insertion compares against an increasing number of earlier colliding tags in ConstructedPayloadDecoderBase._decodeComponentsSchemaless, producing quadratic CPU work while decoded values and order remain valid. Repeated inputs can exhaust decoder CPU and reduce service availability. This issue is fixed in version 0.6.5.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - pyasn1 is a generic ASN.1 library for Python. From 0.3.3 until 0.6.5, schemaless container decoding stores
    every decoded component's TagSet in a growing set even though only one-versus-multiple tag types must be
    distinguished. Attacker-controlled BER, CER, or DER input contains many distinct long tag IDs whose TagSet
    hashes collide. Each later set insertion compares against an increasing number of earlier colliding tags
    in ConstructedPayloadDecoderBase._decodeComponentsSchemaless, producing quadratic CPU work while decoded
    values and order remain valid. Repeated inputs can exhaust decoder CPU and reduce service availability.
    This issue is fixed in version 0.6.5. (CVE-2026-119194)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - pyasn1 is a generic ASN.1 library for Python. From 0.3.3 until 0.6.5, schemaless container decoding stores     every decoded component's TagSet in a growing set even though only one-versus-multiple tag types must be     distinguished. Attacker-controlled BER, CER, or DER input contains many distinct long tag IDs whose TagSet     hashes collide. Each later set insertion compares against an increasing number of earlier colliding tags     in ConstructedPayloadDecoderBase._decodeComponentsSchemaless, producing quadratic CPU work while decoded     values and order remain valid. Repeated inputs can exhaust decoder CPU and reduce service availability.
    This issue is fixed in version 0.6.5. (CVE-2026-119194)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
478120	Chainguard: openstack-keystone-2026.2: security update to 30.0.1_git20261017-r5	Tenable Cloud Security	Chainguard Local Security Checks	Local	high
478120	Chainguard: openstack-keystone-2026.2: security update to 30.0.1_git20261017-r5	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	high
478055	SCA: security update for pyasn1 (GHSA-fm9c-5rcf-2q5p)	Tenable Cloud Security	SCA Checks	Local	high
478055	SCA: security update for pyasn1 (GHSA-fm9c-5rcf-2q5p)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
374111	Linux Distros Unpatched Vulnerability : CVE-2026-119194	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-119194

high

Tenable Plugins

high

high

high

high

high