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CVE-2026-32280

Unexpected work during chain building in crypto/x509

Published: Apr 8, 2026Updated: Apr 16, 2026 Sources: CVE List NVD BDUCWE-770
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 70.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-770

Affected Products

crypto/x509Go standard library
LibraryLibrary
OSS Libraries / generic-library
gogolangOSS Libraries
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
OpenShift Container PlatformRed Hat Inc.
On-prem
Operating Systems / linux-distro
Red Hat QuayRed Hat Inc.
On-prem
Operating Systems / linux-distro
go standard libraryoss-projectUSOSS Librariesaka golang standard library, net/http, crypto/x509, html/template
golangoss-projectUSOSS Libraries
red hat inc.commercialUSOperating Systemsaka red hat
and 63 more affected products View all →

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://go.dev/cl/758320
go.dev
https://go.dev/issue/78282
go.dev
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
groups.google.com
and 8 more references View all →

Timeline

Published
Apr 8, 2026
Last Updated
Apr 16, 2026

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