CVE-2026-89156: CWE-125 Out-of-bounds Read in PCRE PCRE2
CVE-2026-89156 is an out-of-bounds read vulnerability in PCRE2 versions from 10.34 up to but not including 10.48. It occurs in the pcre2_match function after a JIT fallback when processing invalid UTF data. The vulnerability has a low severity score and does not impact confidentiality or integrity but may affect availability.
AI Analysis
Technical Summary
PCRE2 before version 10.48 contains a CWE-125 out-of-bounds read vulnerability triggered in the pcre2_match function after a JIT fallback when an attacker supplies invalid UTF data. This flaw can cause an out-of-bounds memory read, potentially leading to application crashes or denial of service. The vulnerability affects versions >=10.34 and <10.48 of PCRE2. The CVSS 3.1 base score is 2.9, reflecting low severity with local attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
The vulnerability may cause application instability or denial of service due to out-of-bounds memory reads. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
A fix is available in PCRE2 version 10.48 and later. Users should upgrade to version 10.48 or newer to remediate this vulnerability. No other mitigations are indicated.
CVE-2026-89156: CWE-125 Out-of-bounds Read in PCRE PCRE2
Description
CVE-2026-89156 is an out-of-bounds read vulnerability in PCRE2 versions from 10.34 up to but not including 10.48. It occurs in the pcre2_match function after a JIT fallback when processing invalid UTF data. The vulnerability has a low severity score and does not impact confidentiality or integrity but may affect availability.
CVSS v3.1
Score 2.9low
Affected software
PCRE
PCRE2
pkg:github/pcre2project/pcre2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
PCRE2 before version 10.48 contains a CWE-125 out-of-bounds read vulnerability triggered in the pcre2_match function after a JIT fallback when an attacker supplies invalid UTF data. This flaw can cause an out-of-bounds memory read, potentially leading to application crashes or denial of service. The vulnerability affects versions >=10.34 and <10.48 of PCRE2. The CVSS 3.1 base score is 2.9, reflecting low severity with local attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
The vulnerability may cause application instability or denial of service due to out-of-bounds memory reads. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
A fix is available in PCRE2 version 10.48 and later. Users should upgrade to version 10.48 or newer to remediate this vulnerability. No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-09-11T04:03:05.439Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa380d491cc7f3848a3b51e
Added to database: 09/11/2026, 04:17:24 UTC
Last enriched: 09/11/2026, 04:32:58 UTC
Last updated: 09/11/2026, 04:39:58 UTC
Views: 5
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