CVE-2026-8376 Details
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.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-8376
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.4 Probability of exploitation activity being observed over the next 30 days (32st percentile)
CVSS score for CVE-2026-8376
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9.8 Critical
Products affected by CVE-2026-8376
Perl 5.36.0
Perl 5.36.1
Perl 5.36.3
Perl 5.38.0
Perl 5.38.2
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-8376 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 59,633 36.19%
DE 14,928 9.06%
GB 13,834 8.40%
JP 11,594 7.04%
CN 7,007 4.25%
FR 6,782 4.12%
RU 5,338 3.24%
CA 3,819 2.32%
CZ 3,039 1.84%
ID 2,366 1.44%

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CVE-2026-8376 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 68,289 60.97%
Telecommunications 32,912 29.38%
Education 7,030 6.28%
Government/Politics 975 0.87%
Utilities 711 0.63%
Business Services 491 0.44%
Food Production 393 0.35%
Legal 189 0.17%
Retail 119 0.11%
Media/Entertainment 116 0.10%

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