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CVE-2026-7383

Issue summary: A signed integer overflow when sizing the destination buffer for Unicode output in ASN1_mbstring_ncopy() can lead to a heap buffer overflow. Impact summary: A heap buffer overflow may lead to a crash or possibly attacker controlled code execution or other undefined behaviour. In ASN1_mbstring_copy() and ASN1_mbstring_ncopy() the destination size for Unicode output is computed in a signed int: by left shift of the input character count for BMPSTRING (UTF-16) and UNIVERSALSTRING (
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4dc44eab06b0a42184a44f77e6d916cab3d9e460a2936a590c69d46264d63b16
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:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"3.4.6 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/4f8d2bddaa2c8e06f9c33390ee1717059a6e4be6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /containers/cna/references/4
{"name":"3.5.7 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/80c15faaf78042bbb8654a0e234c50c381732f74"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /containers/cna/references/3
{"name":"3.0.21 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/bd17511070fb39a67bfa19682affb765e706a974"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /containers/cna/references/5
{"name":"3.6.3 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/c332adaced43bcbb85f97410597e951c11ec3083"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /containers/cna/references/2
{"name":"4.0.1 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/d32350ae8ef7426718f5aa9e383d4b51398ee255"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /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:c15c9469f3ca380ea753d22e34003bf7207f2729c33d2c0275d57f7bb8399795 · sha256:8275c2b2dbcf1e27… · /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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