What is CVE-2026-89161?

CVE-2026-89161 is a high-severity vulnerability in Pcre Pcre2, classified under CWE-590. CVSS score: 7.4/10. Published 2026-09-11.

How severe is CVE-2026-89161?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Pcre Pcre2

CVE-2026-89161

In PCRE2 before 10.48, pcre2_jit_match mishandles a previously copied subject being passed in as a context. An incorrect free operation can occur.

Published 2026-09-11 · last modified 2026-09-16.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.3th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Pcre Pcre2 — versions 10.48

Weakness classification (CWE)

CWE-590

References

github.com/PCRE2Project/pcre2/pull/937 (Patch)
github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48 (Release Notes)

Frequently asked questions

What is CVE-2026-89161?: CVE-2026-89161 is a high-severity vulnerability in Pcre Pcre2, classified under CWE-590. CVSS score: 7.4/10. Published 2026-09-11.
How severe is CVE-2026-89161?: High severity. CVSS v3 base score is 7.4 out of 10.