How severe is CVE-2025-58050?

CVE-2025-58050 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2025-58050 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-58050?

CVE-2025-58050 affects Pcre Pcre2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-58050?

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

Does CVE-2025-58050 have an EU (EUVD) identifier?

Yes. CVE-2025-58050 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25947.

When was CVE-2025-58050 published?

CVE-2025-58050 was published on 2025-08-27 and last updated on 2026-06-17.

CVE-2025-58050

CVE-2025-58050 is a critical-severity vulnerability in Pcre Pcre2 with a CVSS 3.x base score of 9.1. 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 6.9
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25947
Weakness: CWE-787
Affected product: Pcre Pcre2
Published: 2025-08-27
Last modified: 2026-06-17

Description

The PCRE2 library is a set of C functions that implement regular expression pattern matching. In version 10.45, a heap-buffer-overflow read vulnerability exists in the PCRE2 regular expression matching engine, specifically within the handling of the (*scs:...) (Scan SubString) verb when combined with (*ACCEPT) in src/pcre2_match.c. This vulnerability may potentially lead to information disclosure if the out-of-bounds data read during the memcmp affects the final match result in a way observable by the attacker. This issue has been resolved in version 10.46.

Frequently asked questions

What is CVE-2025-58050?: The PCRE2 library is a set of C functions that implement regular expression pattern matching. In version 10.45, a heap-buffer-overflow read vulnerability exists in the PCRE2 regular expression matching engine, specifically within the handling of the (*scs:...) (Scan SubString) verb when combined with (*ACCEPT) in src/pcre2_match.c. This vulnerability may potentially lead to information disclosure if the out-of-bounds data read during the memcmp affects the final match result in a way observable by the attacker. This issue has been resolved in version 10.46.
How severe is CVE-2025-58050?: CVE-2025-58050 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2025-58050 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-58050?: CVE-2025-58050 affects Pcre Pcre2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-58050?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-58050 have an EU (EUVD) identifier?: Yes. CVE-2025-58050 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25947.
When was CVE-2025-58050 published?: CVE-2025-58050 was published on 2025-08-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pcre:pcre2:10.45:*:*:*:*:*:*:*

More vulnerabilities in Pcre Pcre2

CVE-2017-8786 — Critical (CVSS 9.8): pcre2test.c in PCRE2 10.23 allows remote attackers to cause a denial of service (heap-based buffer overflow) or…
CVE-2017-8399 — Critical (CVSS 9.8): PCRE2 before 10.30 has an out-of-bounds write caused by a stack-based buffer overflow in pcre2_match.c, related to a…
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…
CVE-2016-3191 — Critical (CVSS 9.8): The compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22…
CVE-2022-1587 — Critical (CVSS 9.1): An out-of-bounds read vulnerability was discovered in the PCRE2 library in the get_recurse_data_length() function of…
CVE-2022-1586 — Critical (CVSS 9.1): An out-of-bounds read vulnerability was discovered in the PCRE2 library in the compile_xclass_matchingpath() function…

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