Out-of-bounds Read in Pcre Pcre2
CVE-2026-89156
PCRE2 before 10.48 has a pcre2_match out-of-bounds read after a JIT fallback when an attacker can provide invalid UTF data.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (21.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Pcre Pcre2 — versions 10.48
Weakness classification (CWE)
References
- github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48 (Release Notes)
- github.com/PCRE2Project/pcre2/security/advisories/GHSA-2p8c-ff85-vh9x (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-89156?
- CVE-2026-89156 is a low-severity vulnerability in Pcre Pcre2, classified under Out-of-bounds Read. CVSS score: 2.9/10. Published 2026-09-11.
- How severe is CVE-2026-89156?
- Low severity. CVSS v3 base score is 2.9 out of 10.