CVE-2019-20454EPSS p75.3%
CVE-2019-20454CVE-2019-20454
pcre / pcre2
Description
An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.
Scoring
| CVSS | 7.5 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 1.56% probability of exploitation · percentile 75.3% · 2026-11-03T12:00:27Z |
| Last modified | 2026-11-02 |