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CVE-2026-8376

CRITICAL · CVSS 9.8 EPSS 0.48% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-05-26 · Last synced: 2026-06-20

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-8376
Severity
CRITICAL
CVSS
9.8
EPSS
0.48%

Original NVD Description

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_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. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.