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CVE-2026-42771

Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the most likely result is a crash and a Denial of Service. An internal helper function called from X509_VERIFY_PARAM_[set|add]_email() used a wrong length when validating the local part of an email add
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:da44bb3541b454678b7df84e5ceb80abf57d17fba6fd11a776bd2f8818b0c510
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"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:079fed69a613daa97119a356664d15dd27324216f904955407cce458b93c1349 · sha256:2292762ef919c815… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/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:v2:079fed69a613daa97119a356664d15dd27324216f904955407cce458b93c1349 · sha256:2292762ef919c815… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:079fed69a613daa97119a356664d15dd27324216f904955407cce458b93c1349 · sha256:2292762ef919c815… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"4.0.1 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/6cd187689f8180c1f8a3acde21f88190c4a20de7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:079fed69a613daa97119a356664d15dd27324216f904955407cce458b93c1349 · sha256:2292762ef919c815… · /containers/cna/references/1
{"name":"OpenSSL Advisory","tags":["vendor-advisory"],"url":"https://openssl-library.org/news/secadv/20260609.txt"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:079fed69a613daa97119a356664d15dd27324216f904955407cce458b93c1349 · sha256:2292762ef919c815… · /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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