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VulnerabilityPublished Updated

CVE-2026-32280: Go standard library crypto/x509 · Unthrottled Resource Allocation

Affects Go standard library crypto/x509Source CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 1.26.2 or 1.25.9 soon.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.26.2, 1.25.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Go standard library crypto/x509 to 1.26.2 or 1.25.9.

Affected software

ProductAffectedFixed in
Go standard librarycrypto/x509Affected
  • >=1.26.0-0 <1.26.2
Fixed in
  • 1.26.2
Go standard librarycrypto/x509Affected
  • <1.25.9
Fixed in
  • 1.25.9
Gocrypto/x509pkg:golang/crypto/x509Other threatsAffected
  • <1.25.9
  • >=1.26.0-0 <1.26.2
Fixed in
  • 1.25.9
  • 1.26.2
Gogithub.com/golang/go/src/crypto/x509pkg:golang/github.com/golang/go/src/crypto/x509Other threatsAffected
  • =0
  • =1.26.0-0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and has been released by vendors including Red Hat in their Ansible Automation Platform 2.6 and related products. Users should apply the vendor-provided updates to remediate this vulnerability. No additional mitigations are specified or required beyond applying the official patches.

Description

During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls.

References

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