CVE-2026-86145 Details
Description
PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).
A heap-based buffer overflow vulnerability has been identified in PCRE2 versions 10.32 through 10.47. The issue arises in the DFA matching function, where a cached workspace block is reused without proper size validation, leading to an out-of-bounds write. This vulnerability can be exploited by supplying a crafted regular expression that takes advantage of the flawed workspace management, particularly under a low heap limit set through the API.
Users are advised to upgrade to PCRE2 version 10.48 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 5, 2026CISA-ADP
Assessed Sep 8, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/09/05/3 | CVE | Mailing ListRemedy |
| https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48 | [email protected] | Release NotesVendor |
| https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf | [email protected] | AdvisoryExploitRemedyTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-424 | Improper Protection of Alternate Path | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| PCRE2 | >= 10.32, <= 10.47 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 8, 2026 | CVE Modified | CISA-ADP |
| Sep 5, 2026 | CVE Modified | CVE |
| Sep 5, 2026 | New CVE Received | [email protected] |