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CVE-2026-42766

Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application crash and a Denial of Service. The CMS PasswordRecipientInfo.keyDerivationAlgorithm field is defined as OPTIONAL in the ASN.1 specification and may therefore be absent in specially crafted inputs. During the password-based CMS decryption the OpenSSL CMS implementation dereferences this field without
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a30aaabc9e07bd33705e7d6a4efd0ec920377ff30b588aa23828fce1297d2e76
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"OpenSSL","vendor":"OpenSSL","versions":[{"lessThan":"4.0.1","status":"affected","version":"4.0.0","versionType":"semver"},{"lessThan":"3.6.3","status":"affected","version":"3.6.0","versionType":"semver"},{"lessThan":"3.5.7","status":"affected","version":"3.5.0","versionType":"semver"},{"lessThan":"3.4.6","status":"affected","version":"3.4.0","versionType":"semver"},{"lessThan":"3.0.21","status":"affected","version":"3.0.0","versionType":"semver"},{"lessThan":"1.1.1zh","status":"affected","version":"1.1.1","versionType":"custom"},{"lessThan":"1.0.2zq","s…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /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_v5cvss
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"3.5.7 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/056d06c1918fafbb98c1c85a02e4c47cc4e199ce"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /containers/cna/references/3
{"name":"4.0.1 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/12bc26ffb3a2be728c9b86e1cae277de5b33dfa4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /containers/cna/references/1
{"name":"3.0.21 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/3ff64913615d648cfbb6a6f1cf5529ae7ea829d7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /containers/cna/references/5
{"name":"3.4.6 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/ab52d88cb5374876d59aee3c91f9e4ccce2b7ce4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /containers/cna/references/4
{"name":"3.6.3 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/da26f368732b83e40e9d356fe61c3d3aaab6d2e8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /containers/cna/references/2
{"name":"OpenSSL Advisory","tags":["vendor-advisory"],"url":"https://openssl-library.org/news/secadv/20260609.txt"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e95e0d0fe49878661f3a7e0da99286069be0b1938fb5c4a6ef89c468a5157c7 · sha256:559bf01cc5765504… · /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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