crypto-x509 up to 1.25.8/1.26.1 on Go Certificate algorithmic complexity

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in crypto-x509 up to 1.25.8/1.26.1 on Go and classified as problematic. Affected is an unknown function of the component Certificate Handler. This manipulation causes algorithmic complexity. This vulnerability is handled as CVE-2026-32281. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in crypto-x509 up to 1.25.8/1.26.1 on Go and classified as problematic. Affected by this vulnerability is an unknown part of the component Certificate Handler. The manipulation with an unknown input leads to a algorithmic complexity vulnerability. The CWE definition for the vulnerability is CWE-407. An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. As an impact it is known to affect availability. The summary by CVE is:

Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.

This vulnerability is known as CVE-2026-32281 since 03/11/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 305623 (Linux Distros Unpatched Vulnerability : CVE-2026-32281), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.25.9 or 1.26.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (305623) and CERT Bund (WID-SEC-2026-1006). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Red Hat Ansible Automation Platform
  • Google Container-Optimized OS
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • Red Hat OpenShift
  • SUSE openSUSE
  • RESF Rocky Linux
  • Red Hat OpenStack
  • Microsoft Azure Linux
  • Golang Go
  • Open Source CoreDNS
  • IBM Business Automation Workflow
  • Open Source Fleet
  • Splunk Splunk Enterprise

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

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

NVD Base Score: 7.5
NVD Vector: 🔒

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Algorithmic complexity
CWE: CWE-407 / 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: 305623
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-32281

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: crypto-x509 1.25.9/1.26.2

Timelineinfo

03/11/2026 CVE reserved
04/08/2026 +27 days Advisory disclosed
04/08/2026 +0 days VulDB entry created
07/27/2026 +110 days VulDB entry last update

Sourcesinfo

Status: Confirmed

CVE: CVE-2026-32281 (🔒)
GCVE (CVE): GCVE-0-2026-32281
GCVE (VulDB): GCVE-100-355981
CERT Bund: WID-SEC-2026-1006 - Golang Go: Mehrere Schwachstellen

Entryinfo

Created: 04/08/2026 07:39
Updated: 07/27/2026 08:07
Changes: 04/08/2026 07:39 (53), 04/09/2026 05:18 (7), 04/13/2026 02:20 (2), 04/29/2026 04:52 (1), 05/04/2026 01:49 (1), 06/01/2026 17:40 (1), 07/17/2026 04:01 (1), 07/27/2026 08:07 (21)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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