| Name | CVE-2026-33810 |
| Description | When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| golang-1.15 (PTS) | bullseye | 1.15.15-1~deb11u4 | fixed |
| golang-1.19 (PTS) | bookworm | 1.19.8-2 | fixed |
| golang-1.24 (PTS) | trixie | 1.24.4-1 | fixed |
| forky, sid | 1.24.13-2 | fixed | |
| golang-1.25 (PTS) | forky | 1.25.8-1 | fixed |
| sid | 1.25.9-1 | fixed | |
| golang-1.26 (PTS) | forky | 1.26.1-1 | vulnerable |
| sid | 1.26.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| golang-1.15 | source | (unstable) | (not affected) | |||
| golang-1.19 | source | (unstable) | (not affected) | |||
| golang-1.24 | source | (unstable) | (not affected) | |||
| golang-1.25 | source | (unstable) | (not affected) | |||
| golang-1.26 | source | (unstable) | 1.26.2-1 |
- golang-1.25 <not-affected> (Vulnerable code not present)
- golang-1.24 <not-affected> (Vulnerable code not present)
- golang-1.19 <not-affected> (Vulnerable code not present)
- golang-1.15 <not-affected> (Vulnerable code not present)
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
https://github.com/golang/go/issues/78332
Fixed by: https://github.com/golang/go/commit/ceb4da6626ce94d75b2aefd0f24c6d0fd74f45f9 (go1.26.2)