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SCA: security update for pyasn1 (GHSA-9m75-vc3g-4x39)

high Tenable Cloud Security Plugin ID 478054

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 0.6.5, constructed string and indefinite-length ANY
 decoding repeatedly concatenates each fragment onto a growing bytes value. Attacker-controlled BER or CER
 data can use many constructed OCTET STRING or character-string fragments. DER rejects constructed OCTET
 STRING without a schema, but accepts its definite-length form when asn1Spec selects univ.OctetString; it
 also accepts constructed character strings such as UTF8String without a schema, even though those
 encodings are not valid DER. The separate indefinite-length ANY path is reachable in BER and CER when
 asn1Spec selects univ.Any; DER rejects indefinite lengths. OctetStringPayloadDecoder uses growing header
 concatenation and AnyPayloadDecoder.indefLenValueDecoder uses growing chunk concatenation, repeatedly
 copying an increasing prefix and causing quadratic work. A sufficiently fragmented value can occupy
 decoding workers and cause CPU exhaustion without confidentiality or integrity impact. This issue is fixed
 in version 0.6.5. (CVE-2026-119195)

Solution

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

See Also

https://github.com/advisories/GHSA-9m75-vc3g-4x39

Plugin Details

Severity: High

ID: 478054

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/31/2026

Updated: 10/31/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 92.83

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-2026-119195

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-2026-119195

cwe: CWE-407