pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.5, constructed BIT STRING decoding repeatedly shifts and copies the complete bit value accumulated from earlier fragments. Attacker-controlled BER or CER input contains many constructed BIT STRING fragments; schema-driven DER also accepts a definite-length constructed BIT STRING. BitStringPayloadDecoder repeatedly calls BitString.fromOctetString with the prior bitString as prepend, shifting an ever-growing SizedInteger for each fragment and causing quadratic work. Large fragmented values can exhaust CPU during decode() without requiring later conversion or formatting. 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. Prior to 0.6.5, constructed BIT STRING decoding repeatedly
    shifts and copies the complete bit value accumulated from earlier fragments. Attacker-controlled BER or
    CER input contains many constructed BIT STRING fragments; schema-driven DER also accepts a definite-length
    constructed BIT STRING. BitStringPayloadDecoder repeatedly calls BitString.fromOctetString with the prior
    bitString as prepend, shifting an ever-growing SizedInteger for each fragment and causing quadratic work.
    Large fragmented values can exhaust CPU during decode() without requiring later conversion or formatting.
    This issue is fixed in version 0.6.5. (CVE-2026-119196)

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. Prior to 0.6.5, constructed BIT STRING decoding repeatedly     shifts and copies the complete bit value accumulated from earlier fragments. Attacker-controlled BER or     CER input contains many constructed BIT STRING fragments; schema-driven DER also accepts a definite-length     constructed BIT STRING. BitStringPayloadDecoder repeatedly calls BitString.fromOctetString with the prior     bitString as prepend, shifting an ever-growing SizedInteger for each fragment and causing quadratic work.
    Large fragmented values can exhaust CPU during decode() without requiring later conversion or formatting.
    This issue is fixed in version 0.6.5. (CVE-2026-119196)

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

ID	Name	Product	Family	Type	Severity
478119	Chainguard: openstack-keystone-2026.2: security update to 30.0.1_git20261017-r5	Tenable Cloud Security	Chainguard Local Security Checks	Local	high
478119	Chainguard: openstack-keystone-2026.2: security update to 30.0.1_git20261017-r5	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	high
478087	SCA: security update for pyasn1 (GHSA-2qm8-x737-gmw5)	Tenable Cloud Security	SCA Checks	Local	high
478087	SCA: security update for pyasn1 (GHSA-2qm8-x737-gmw5)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
374106	Linux Distros Unpatched Vulnerability : CVE-2026-119196	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-119196

high

Tenable Plugins

high

high

high

high

high