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CVE-2026-32884

Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not required by RFC 5280. However this check failed to account for the possibility of a mixed-case CN. Thus a certificate with CN=Sub.EVIL.C
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8c420fb117d2537c09ddcd68c285ac82d343a169b48cd049fc0c198003f6bbb5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"botan","vendor":"randombit","versions":[{"status":"affected","version":"< 3.11.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9912e7b4fd0805a8afebecd1b6eaae682f3fe0d46bdfb9b237082fa358a1828b · sha256:70a9601e4afee5fb… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9912e7b4fd0805a8afebecd1b6eaae682f3fe0d46bdfb9b237082fa358a1828b · sha256:70a9601e4afee5fb… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-295","description":"CWE-295: Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9912e7b4fd0805a8afebecd1b6eaae682f3fe0d46bdfb9b237082fa358a1828b · sha256:70a9601e4afee5fb… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/randombit/botan/security/advisories/GHSA-7c3g-7763-ggj5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/randombit/botan/security/advisories/GHSA-7c3g-7763-ggj5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9912e7b4fd0805a8afebecd1b6eaae682f3fe0d46bdfb9b237082fa358a1828b · sha256:70a9601e4afee5fb… · /containers/cna/references/0

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.

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