Detections
Analytics

SCA: security update for pyssn1 (GHSA-m4p7-r5rc-7g4j)

high Tenable Cloud Security Plugin ID 445100

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. Prior to 0.6.4, the BER decoder shared by the CER and DER
 codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID
 size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing
 quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any
 application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.
 (CVE-2026-59884)

Solution

Update the pyssn1 library and its related packages to version 0.6.4 or later.

See Also

https://github.com/advisories/GHSA-m4p7-r5rc-7g4j

Plugin Details

Severity: High

ID: 445100

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 7/22/2026

Updated: 7/22/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.77

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-2026-59884

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: 7/21/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-59884

cwe: CWE-400