High severity · published Sep 11, 2026
CVE-2026-89157
PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern
7.4
CVSS
0.3%
EPSS
No
On KEV
Description
PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PC
PCRE2 · PCRE
10.30 before 10.48 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89157
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89157
Release Notes
https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48
Exploit
https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-q8g2-wprr-34m9
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