How severe is CVE-2026-86145?

CVE-2026-86145 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2026-86145 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-86145?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-86145 published?

CVE-2026-86145 was published on 2026-09-05 and last updated on 2026-09-09.

CVE-2026-86145

CVE-2026-86145 is a high-severity vulnerability with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-424.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-424
Published: 2026-09-05
Last modified: 2026-09-09

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).

Frequently asked questions

What is CVE-2026-86145?: 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 severe is CVE-2026-86145?: CVE-2026-86145 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2026-86145 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-86145?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-86145 published?: CVE-2026-86145 was published on 2026-09-05 and last updated on 2026-09-09.

References

Other CWE-424 vulnerabilities

CVE-2025-48827 — Critical (CVSS 10.0): vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers'…
CVE-2026-66756 — Critical (CVSS 9.8): Improper Protection of Alternate Path vulnerability in Apache Tika. This issue affects Apache Tika: from 4.0.0-alpha-1…
CVE-2025-48828 — Critical (CVSS 9.0): Certain vBulletin versions might allow attackers to execute arbitrary PHP code by abusing Template Conditionals in the…
CVE-2024-58136 — Critical (CVSS 9.0): Yii 2 before 2.0.52 mishandles the attaching of behavior that is defined by an __class array key, a CVE-2024-4990…
CVE-2023-52952 — High (CVSS 8.5): A vulnerability has been identified in HiMed Cockpit 12 pro (J31032-K2017-H259) (All versions >= V11.5.1 < V11.6.2),…
CVE-2024-3459 — High (CVSS 8.4): KioWare for Windows (versions all through 8.34) allows to escape the environment by downloading PDF files, which then…

Browse all CWE-424 vulnerabilities →