CVE-2026-32280: Go standard library crypto/x509 · Unthrottled Resource Allocation
Affects Go standard library crypto/x509Source CVE Database V5
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
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 8 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Go standard librarycrypto/x509 | Affected
| Fixed in
|
| Go standard librarycrypto/x509 | Affected
| Fixed in
|
Gocrypto/x509pkg:golang/crypto/x509Other threats | Affected
| Fixed in
|
Gogithub.com/golang/go/src/crypto/x509pkg:golang/github.com/golang/go/src/crypto/x509Other threats | Affected
| 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
- go.dev/cl/758320 (opens in a new tab)
- go.dev/issue/78282 (opens in a new tab)
- groups.google.com/g/golang-announce/c/0uYbvbPZRWU (opens in a new tab)
- pkg.go.dev/vuln/GO-2026-4947 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-32280 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2456339 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32280.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:24762 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:41019 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:16101 (opens in a new tab)
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- access.redhat.com/errata/RHSA-2026:28886 (opens in a new tab)
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