How severe is CVE-2026-89161?

CVE-2026-89161 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-89161 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-89161?

CVE-2026-89161 primarily affects Pcre Pcre2. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-89161?

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-2026-89161 published?

CVE-2026-89161 was published on 2026-09-11 and last updated on 2026-09-16.

CVE-2026-89161

CVE-2026-89161 is a high-severity vulnerability in Pcre Pcre2 with a CVSS 3.x base score of 7.4. 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-590.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-590
Affected product: Pcre Pcre2
Published: 2026-09-11
Last modified: 2026-09-16

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.

Frequently asked questions

What is CVE-2026-89161?: 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.
How severe is CVE-2026-89161?: CVE-2026-89161 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-89161 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-89161?: CVE-2026-89161 primarily affects Pcre Pcre2. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-89161?: 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-2026-89161 published?: CVE-2026-89161 was published on 2026-09-11 and last updated on 2026-09-16.

References

Affected products (2)

cpe:2.3:a:pcre:pcre2:*:*:*:*:*:*:*:*
cpe:2.3:a:pcre:pcre2:10.48:rc1:*:*:*:*:*:*

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CVE-2015-3210 — Critical (CVSS 9.8): Heap-based buffer overflow in PCRE 8.34 through 8.37 and PCRE2 10.10 allows remote attackers to execute arbitrary code…
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