CVE-2026-86145
HIGHDescription
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).
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 31% of all known CVEs.
References
Related Vulnerabilities
Other CWE-424 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-58136 | Critical | 9.0 | 88% | KEV | Fix |
| CVE-2025-48827 | Critical | 10.0 | 76% | - | - |
| CVE-2025-48828 | Critical | 9.0 | 58% | - | - |
| CVE-2019-18997 | Medium | 4.3 | 1.5% | - | - |
| CVE-2023-20272 | Medium | 6.7 | 0.9% | - | - |
| CVE-2021-3793 | Medium | 6.5 | 0.7% | - | Fix |
Common questions
How do I fix CVE-2026-86145?
Upgrade pcre2 on debian 12 to 10.42-1+deb12u1 or later.
Is CVE-2026-86145 being actively exploited?
Not that we know of. CVE-2026-86145 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.37% is the estimated probability that it will be exploited in the next 30 days. That is higher than 31% of all scored CVEs.
How severe is CVE-2026-86145?
CVE-2026-86145 has a CVSS v3 base score of 8.2, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-86145 affect?
Published advisories record a fix for pcre2 (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-09.