PCRE PCRE2 up to 10.48 JIT out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in PCRE PCRE2 up to 10.48. The affected element is an unknown function of the component JIT. Executing a manipulation can lead to out-of-bounds write. This vulnerability appears as CVE-2026-103111. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in PCRE PCRE2 up to 10.48. This vulnerability affects some unknown functionality of the component JIT. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-103111 since 09/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 367266 (MiracleLinux 8 : pcre2-10.32-4.el8_10 (AXSA:2026-2088:03)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.49 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (367266), EUVD (EUVD-2026-89608) and CERT Bund (WID-SEC-2026-3622). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • RESF Rocky Linux
  • Oracle Linux
  • Open Source PCRE (Perl Compatible Regular Expressions)

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.6
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 367266
Nessus Name: MiracleLinux 8 : pcre2-10.32-4.el8_10 (AXSA:2026-2088:03)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PCRE2 10.49

Timelineinfo

09/30/2026 Advisory disclosed
09/30/2026 +0 days CVE reserved
09/30/2026 +0 days VulDB entry created
10/24/2026 +24 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-103111 (🔒)
GCVE (CVE): GCVE-0-2026-103111
GCVE (VulDB): GCVE-100-411868
EUVD: 🔒
CERT Bund: WID-SEC-2026-3622 - PCRE (Perl Compatible Regular Expressions): Schwachstelle ermöglicht Codeausführung

Entryinfo

Created: 09/30/2026 06:49
Updated: 10/24/2026 03:21
Changes: 09/30/2026 06:49 (65), 10/04/2026 03:58 (1), 10/19/2026 18:03 (2), 10/19/2026 18:19 (7), 10/22/2026 09:19 (1), 10/24/2026 03:21 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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