EUVD-2026-75946
GHSA-7g92-94jm-fx5f
Severity by source
AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Local vector and high complexity reflect specific two-step API precondition; full CIA impact warranted for a heap corruption primitive.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
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.
AnalysisAI
Incorrect memory free (CWE-590) in PCRE2's JIT fast path allows heap corruption when match data previously used with PCRE2_COPY_MATCHED_SUBJECT is reused in a subsequent pcre2_jit_match() call. Affected versions are PCRE2 prior to 10.48. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three simultaneous conditions: (1) PCRE2 must be compiled with JIT support (SUPPORT_JIT compile-time flag); (2) the calling application must invoke pcre2_match() with the PCRE2_COPY_MATCHED_SUBJECT flag on a match_data block, causing the library to set PCRE2_MD_COPIED_SUBJECT internally; and (3) that same match_data block must subsequently be passed to pcre2_jit_match() without re-initialization, triggering the incorrect free. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.4 with vector AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H reflects a local, high-complexity exploit with full CIA impact if achieved. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade PCRE2 to version 10.48 or later; this version includes the fix from PR #937 (https://github.com/PCRE2Project/pcre2/pull/937). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems and applications using PCRE2 prior to version 10.48, including embedded instances in web servers, language interpreters, and text-processing utilities. …
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Same weakness CWE-590 – Free of Memory not on the Heap
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External POC / Exploit Code
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