Detections
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SCA: security update for pyasn1 (GHSA-fm9c-5rcf-2q5p)

high Tenable Cloud Security Plugin ID 478055

Description

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)

Solution

Update the pyasn1 library and its related packages to version 0.6.5 or later.

See Also

https://github.com/advisories/GHSA-fm9c-5rcf-2q5p

Plugin Details

Severity: High

ID: 478055

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/31/2026

Updated: 10/31/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-119194

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/30/2026

Vulnerability Publication Date: 10/29/2026

Reference Information

CVE: CVE-2026-119194

cwe: CWE-407