High severity · published Sep 11, 2026
CVE-2026-89161
In PCRE2 before 10.48, pcre2_jit_match mishandles a previously copied subject being passed in as a context
7.8
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PC
PCRE2 · PCRE
before 10.48 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89161
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89161
Patch
https://github.com/PCRE2Project/pcre2/pull/937
Release Notes
https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48
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