CVE-2026-89161 PCRE2 - Use After Free

PCRE2 < 10.48 contains a use after free caused by mishandling a previously copied subject passed as context in pcre2_jit_match, letting attackers cause memory corruption, exploit requires crafted input.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.13% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026
Weakness
CWE-590

Vendor fix

Update to version 10.48 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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