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CVE

CVE-2026-33810

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (important)
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CVE

CVE-2026-33810

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (important)

DOCUMENTATION: A flaw was found in the crypto/x509 package within Go (golang). When verifying a certificate chain, excluded DNS (Domain Name System) constraints are not correctly applied to wildcard DNS Subject Alternative Names (SANs) if the case of the SAN differs from the constraint. This oversight could allow an attacker to bypass certificate validation, potentially leading to the acceptance of a malicious certificate that should have been rejected. This issue specifically impacts the validation of trusted certificate chains.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.2
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
C
H
U
-
C
H
U
-

Related Resources

No items found.

References

https://access.redhat.com/security/cve/CVE-2026-33810

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.00013%
EPSS Percentile
0.0233%
Introduced Version
0
Fix Available
0:0.144.0-2.el9_8,1.25.9-r0,0.14.1-r0,0,1.2.15-r0,1.0.0-r3,1.0.0-r6,1.1.0-r3,0.1.37-r1,0.7.16-r1,3.2.1-r0,1.3.2-r2,1.8.1-r7,1.8.1-r1,0.4.1-r1,1.16.19-r7,1.17.16-r1,1.18.10-r2,0.27.0-r2,1.61.1-r0,1.17.5-r0,3.3.2-r2,3.3.3-r1,2.33.0-r2,25.3.2-r0,4.1.0-r2,1.5.2_git20260416-r0,0.0.0_git20260322-r3,0.0.0_git20260531-r0,2.2.0-r3,2.8.8-r2,1.5.5-r2,1.1.1-r11,1.1.4-r2,1.1.2-r2,1.8.3-r3,0.50.0-r0,1.8.2-r4,1.8.2-r1,2.1.1-r5,2.1.1-r3,0.11.0-r5,0.11.0-r0,2.90.0-r0,1.1.2-r0,2.15.3-r1,5.22.2-r4,5.23.0-r1,0.37.0-r1,1.18.6-r6,1.13.9-r2,1.14.5-r12,1.15.6-r0,1.14.5-r2,0.1.2-r7,0.1.2-r6,0.131-r1,1.10.0-r2,1.11.1-r0,4.1.0-r33,1.2.2-r17,1.7.0-r13,2.13.0-r2,0.6.0-r8,6.1.0-r2,0.0.36-r1,4.14.0-r7,1.22.1-r0,26.3.0-r7,26.3.0-r4,4.15.0-r4,2.4.1-r11,2.5.0-r7,2.7.3-r0,0.27.1-r0,1.42.2-r1,1.42.2-r2,4.0.18-r41,5.5.0-r0,0.0.5-r3,3.11.14-r3,3.11.14-r2,1.6.5-r0,0.12.5-r0,1.3.2-r3,2.3.5-r1,5.2.0-r2,5.24.0-r4,5.24.0-r2,6.12.0-r2,10.1.7-r2,10.2.0-r3,1.19.2-r3,1.19.2-r1,0.36.6-r0,3.1.0-r2,1.0.22-r6,1.20.11-r32,0_git20260409-r1,1.14.5-r0,1.4.17-r1,0.2.46-r0,1.96.4-r1,1.6.2-r3,1.50.0-r2,1.140.0-r0,1.144.0-r1,0.9.5-r0,0.9.4-r1

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