5.9

CVE-2026-89156: pcre pcre2 Out-of-bounds Read

CVSS: 5.9v3.1MediumAnalyzed
AliasesALPINE-CVE-2026-89156UBUNTU-CVE-2026-89156DEBIAN-CVE-2026-89156
Published 11-09-2026Last modified 14-09-2026
Open JSON

Vulnerability summary

CVE-2026-89156 is a medium (CVSS 5.9) Out-of-bounds Read vulnerability in pcre pcre2. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 11 · Related 8
OPENSUSE-SU-2026:21938-1RHSA-2026:67534RHSA-2026:81522RHSA-2026:81532SUSE-SU-2026:23740-1SUSE-SU-2026:23840-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 14-09-2026
    Last modifiedVulnerability information updated.

Description

PCRE2 before 10.48 has a pcre2_match out-of-bounds read after a JIT fallback when an attacker can provide invalid UTF data.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

+0.07 pp

From 0.23% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Pcre2

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • pcre2< 10.43-r1 | < 10.46-r1 | < 10.48-r0
Debian1 product
  • pcre2< 10.42-1+deb12u1 | < 10.46-1~deb13u2 | < 10.48-1
Pcre1 product
  • pcre2≥ 10.34, < 10.48 | < 10.48 | 10.48:rc1
Ubuntu1 product
  • pcre2All versions (No fix recorded)

4 vendors · 4 products

References

7 links