CVE Explorer
CVE-2026-27138
Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"collectionURL":"https://pkg.go.dev","defaultStatus":"unaffected","packageName":"crypto/x509","product":"crypto/x509","programRoutines":[{"name":"dnsConstraints.query"},{"name":"Certificate.Verify"}],"vendor":"Go standard library","versions":[{"lessThan":"1.26.1","status":"affected","version":"1.26.0-0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c1c5cae6b04cc89ee2a41677c1399d10c2b2dd63e096497a9af50e52ac7de6d0 · sha256:d8836457ec6cfb1a… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c1c5cae6b04cc89ee2a41677c1399d10c2b2dd63e096497a9af50e52ac7de6d0 · sha256:d8836457ec6cfb1a… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"description":"CWE-1285: Improper Validation of Specified Index, Position, or Offset in Input","lang":"en"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:c1c5cae6b04cc89ee2a41677c1399d10c2b2dd63e096497a9af50e52ac7de6d0 · sha256:d8836457ec6cfb1a… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"url":"https://go.dev/cl/752183"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c1c5cae6b04cc89ee2a41677c1399d10c2b2dd63e096497a9af50e52ac7de6d0 · sha256:d8836457ec6cfb1a… · /containers/cna/references/2
{"url":"https://go.dev/issue/77953"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c1c5cae6b04cc89ee2a41677c1399d10c2b2dd63e096497a9af50e52ac7de6d0 · sha256:d8836457ec6cfb1a… · /containers/cna/references/1
{"url":"https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c1c5cae6b04cc89ee2a41677c1399d10c2b2dd63e096497a9af50e52ac7de6d0 · sha256:d8836457ec6cfb1a… · /containers/cna/references/0
{"url":"https://pkg.go.dev/vuln/GO-2026-4600"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c1c5cae6b04cc89ee2a41677c1399d10c2b2dd63e096497a9af50e52ac7de6d0 · sha256:d8836457ec6cfb1a… · /containers/cna/references/3
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.