CVE-2026-103111

pcre2: pcre2: Out-of-bounds write via crafted regular expression

Published Sep 30, 2026 CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed
Description
PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4816-1 pcre2 security update
Ubuntu USN Ubuntu USN USN-8974-1 PCRE2 vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Out‑of‑Bounds Write in PCRE2 JIT API for Versions before 10.49 pcre2: pcre2: Out-of-bounds write via crafted regular expression
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
Title Out‑of‑Bounds Write in PCRE2 JIT API for Versions before 10.49
Type Values Removed Values Added
Description PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.
First Time appeared Pcre
Pcre pcre2
Weaknesses CWE-787
CPEs cpe:2.3:a:pcre:pcre2:*:*:*:*:*:*:*:*
Vendors & Products Pcre
Pcre pcre2
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 3, 2026, 11:51 PM
Reserved
Sep 30, 2026, 4:13 AM
Status
Awaiting Analysis
Published
Sep 30, 2026, 5:16 AM
Modified
Oct 4, 2026, 12:16 AM
Severity
Important
Public date
Sep 30, 2026, 4:13 AM