VDB-402345 · CVE-2026-89157 · Nessus 366075

PCRE PCRE2 up to 10.47 pcre2_pattern_convert out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.8	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in PCRE PCRE2 up to 10.47. This impacts the function pcre2_pattern_convert. Performing a manipulation results in out-of-bounds write. This vulnerability is known as CVE-2026-89157. Attacking locally is a requirement. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in PCRE PCRE2 up to 10.47. This affects the function pcre2_pattern_convert. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on integrity, and availability. The summary by CVE is:

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-89157 since 09/11/2026. The exploitability is told to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 366075 (Rocky Linux 10.2 [CIQ] Security Update: pcre2 / pcre2-debuginfo / pcre2-debugsource / pcre2-devel / etc Multiple Vulnerabilities (crlsa-2026_81522)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.48 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (366075) and CERT Bund (WID-SEC-2026-3334). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Open Source PCRE (Perl Compatible Regular Expressions)

Productinfo

Type

Programming Tool Software

Vendor

PCRE

Name

PCRE2

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.4
NVD Vector: 🔒

CNA Base Score: 5.7
CNA Vector (MITRE): 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 366075
Nessus Name: Rocky Linux 10.2 [CIQ] Security Update: pcre2 / pcre2-debuginfo / pcre2-debugsource / pcre2-devel / etc Multiple Vulnerabilities (crlsa-2026_81522)