{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8376","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","state":"PUBLISHED","assignerShortName":"CPANSec","dateReserved":"2026-05-12T08:15:41.456Z","datePublished":"2026-05-25T23:53:27.812Z","dateUpdated":"2026-05-27T18:04:00.329Z"},"containers":{"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"perl","product":"perl","programFiles":["regcomp_study.c"],"programRoutines":[{"name":"Perl_study_chunk"}],"repo":"https://github.com/Perl/perl5","vendor":"SHAY","versions":[{"lessThanOrEqual":"5.43.10","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds.\n\nPerl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer.\n\nA caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-680","description":"CWE-680 Integer Overflow to Buffer Overflow","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","shortName":"CPANSec","dateUpdated":"2026-05-25T23:53:27.812Z"},"references":[{"tags":["patch"],"url":"https://github.com/Perl/perl5/commit/5e7f119eb2bb1181be908701f22bf7068e722f1c.patch"}],"solutions":[{"lang":"en","value":"Upgrade to a future perl release, or apply the upstream patch."}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2026-04-24T00:00:00.000Z","value":"Issue reported."},{"lang":"en","time":"2026-05-20T00:00:00.000Z","value":"Fix merged to blead."}],"title":"Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds","workarounds":[{"lang":"en","value":"On 32-bit perl builds, avoid compiling regular expressions from untrusted input until a fixed release is installed."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/05/26/1"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-05-26T03:06:00.816Z"}},{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.3,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"LOW","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-05-27T18:03:45.554441Z","id":"CVE-2026-8376","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-27T18:04:00.329Z"}}]}}