Vulnerability Details CVE-2026-7259
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.4%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-7259
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cpe:2.3:a:php:php:8.2.0
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cpe:2.3:a:php:php:8.2.1
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cpe:2.3:a:php:php:8.2.10
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cpe:2.3:a:php:php:8.2.11
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cpe:2.3:a:php:php:8.2.12
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cpe:2.3:a:php:php:8.2.13
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cpe:2.3:a:php:php:8.2.14
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cpe:2.3:a:php:php:8.2.15
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cpe:2.3:a:php:php:8.2.16
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cpe:2.3:a:php:php:8.2.17
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cpe:2.3:a:php:php:8.2.18
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cpe:2.3:a:php:php:8.2.19
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cpe:2.3:a:php:php:8.2.2
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cpe:2.3:a:php:php:8.2.20
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cpe:2.3:a:php:php:8.2.21
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cpe:2.3:a:php:php:8.2.22
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cpe:2.3:a:php:php:8.2.23
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cpe:2.3:a:php:php:8.2.24
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cpe:2.3:a:php:php:8.2.25
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cpe:2.3:a:php:php:8.2.26
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cpe:2.3:a:php:php:8.2.28
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cpe:2.3:a:php:php:8.2.29
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cpe:2.3:a:php:php:8.2.3
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cpe:2.3:a:php:php:8.2.30
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cpe:2.3:a:php:php:8.2.4
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cpe:2.3:a:php:php:8.2.5
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cpe:2.3:a:php:php:8.2.6
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cpe:2.3:a:php:php:8.2.7
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cpe:2.3:a:php:php:8.2.8
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cpe:2.3:a:php:php:8.2.9
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cpe:2.3:a:php:php:8.3.0
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cpe:2.3:a:php:php:8.3.1
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cpe:2.3:a:php:php:8.3.10
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cpe:2.3:a:php:php:8.3.11
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cpe:2.3:a:php:php:8.3.12
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cpe:2.3:a:php:php:8.3.13
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cpe:2.3:a:php:php:8.3.14
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cpe:2.3:a:php:php:8.3.15
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cpe:2.3:a:php:php:8.3.16
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cpe:2.3:a:php:php:8.3.17
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cpe:2.3:a:php:php:8.3.18
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cpe:2.3:a:php:php:8.3.19
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cpe:2.3:a:php:php:8.3.2
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cpe:2.3:a:php:php:8.3.20
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cpe:2.3:a:php:php:8.3.21
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cpe:2.3:a:php:php:8.3.22
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cpe:2.3:a:php:php:8.3.23
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cpe:2.3:a:php:php:8.3.24
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cpe:2.3:a:php:php:8.3.25
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cpe:2.3:a:php:php:8.3.26
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cpe:2.3:a:php:php:8.3.27
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cpe:2.3:a:php:php:8.3.28
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cpe:2.3:a:php:php:8.3.29
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cpe:2.3:a:php:php:8.3.3
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cpe:2.3:a:php:php:8.3.30
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cpe:2.3:a:php:php:8.3.4
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cpe:2.3:a:php:php:8.3.5
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cpe:2.3:a:php:php:8.3.6
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cpe:2.3:a:php:php:8.3.7
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cpe:2.3:a:php:php:8.3.8
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cpe:2.3:a:php:php:8.3.9
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cpe:2.3:a:php:php:8.4.0
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cpe:2.3:a:php:php:8.4.1
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cpe:2.3:a:php:php:8.4.10
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cpe:2.3:a:php:php:8.4.11
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cpe:2.3:a:php:php:8.4.12
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cpe:2.3:a:php:php:8.4.13
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cpe:2.3:a:php:php:8.4.14
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cpe:2.3:a:php:php:8.4.15
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cpe:2.3:a:php:php:8.4.16
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cpe:2.3:a:php:php:8.4.17
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cpe:2.3:a:php:php:8.4.18
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cpe:2.3:a:php:php:8.4.19
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cpe:2.3:a:php:php:8.4.2
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cpe:2.3:a:php:php:8.4.20
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cpe:2.3:a:php:php:8.4.3
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cpe:2.3:a:php:php:8.4.4
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cpe:2.3:a:php:php:8.4.5
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cpe:2.3:a:php:php:8.4.6
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cpe:2.3:a:php:php:8.4.7
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cpe:2.3:a:php:php:8.4.8
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cpe:2.3:a:php:php:8.4.9
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cpe:2.3:a:php:php:8.5.0
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cpe:2.3:a:php:php:8.5.1
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cpe:2.3:a:php:php:8.5.2
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cpe:2.3:a:php:php:8.5.3
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cpe:2.3:a:php:php:8.5.4
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cpe:2.3:a:php:php:8.5.5