pyasn1 up to 0.6.1 RELATIVE-OID allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in pyasn1 up to 0.6.1 and classified as problematic. The impacted element is an unknown function. The manipulation of the argument RELATIVE-OID leads to allocation of resources. This vulnerability is referenced as CVE-2026-23490. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in pyasn1 up to 0.6.1 and classified as problematic. This issue affects an unknown part. The manipulation of the argument RELATIVE-OID with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-23490 since 01/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 291279 (Linux Distros Unpatched Vulnerability : CVE-2026-23490), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.6.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3908f144229eed4df24bd569d16e5991ace44970 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (291279), EUVD (EUVD-2026-2865) and CERT Bund (WID-SEC-2026-0306). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Red Hat Enterprise Linux
  • Fedora Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 291279
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23490

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: pyasn1 0.6.2
Patch: 3908f144229eed4df24bd569d16e5991ace44970

Timelineinfo

01/13/2026 CVE reserved
01/16/2026 +3 days Advisory disclosed
01/16/2026 +0 days VulDB entry created
03/08/2026 +51 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-63vm-454h-vhhq
Status: Confirmed

CVE: CVE-2026-23490 (🔒)
GCVE (CVE): GCVE-0-2026-23490
GCVE (VulDB): GCVE-100-341645
EUVD: 🔒
CERT Bund: WID-SEC-2026-0306 - Red Hat Enterprise Linux (pyasn1): Schwachstelle ermöglicht Denial of Service

Entryinfo

Created: 01/16/2026 20:31
Updated: 03/08/2026 14:31
Changes: 01/16/2026 20:31 (66), 01/17/2026 16:50 (2), 02/02/2026 00:16 (1), 02/05/2026 11:12 (7), 02/09/2026 14:49 (1), 03/08/2026 14:31 (1)
Complete: 🔍
Cache ID: 216::103

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