What is CVE-2026-103111?

CVE-2026-103111 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. 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.

Which CVE IDs does CVE-2026-103111 cover?

CVE-2026-103111 covers the following CVE IDs: CVE-2026-103111. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-103111?

CVE-2026-103111 has a CVSS v3 base score of 7.6, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-103111?

CVE-2026-103111 affects 4 products, including: azl3 php 8.3.33-1 on Azure Linux 3.0; azl3 python-jwt 2.13.0-1 on Azure Linux 3.0; azl3 rust 1.75.0-31 on Azure Linux 3.0; azl3 rust 1.96.1-2 on Azure Linux 3.0.

CVE-2026-103111HighCVSS 7.6

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.

Vendor

Microsoft Security Response Center (MSRC)

Published

October 1, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-103111 →

🎯 Affected products4

azl3 php 8.3.33-1 on Azure Linux 3.0
azl3 python-jwt 2.13.0-1 on Azure Linux 3.0
azl3 rust 1.75.0-31 on Azure Linux 3.0
azl3 rust 1.96.1-2 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-103111
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade