CVE Explorer
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().
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"affected","packageName":"mbstring","product":"PHP","vendor":"PHP Group","versions":[{"lessThan":"8.2.31","status":"affected","version":"8.2.*","versionType":"semver"},{"lessThan":"8.3.31","status":"affected","version":"8.3.*","versionType":"semver"},{"lessThan":"8.4.21","status":"affected","version":"8.4.*","versionType":"semver"},{"lessThan":"8.5.6","status":"affected","version":"8.5.*","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:196ac9a7517f59991848aeb5bd52b78d44fae2f63665c6f565cb286de365c280 · sha256:6d3029f0558f0014… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"YES","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.1,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/U:Amber","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact"…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:196ac9a7517f59991848aeb5bd52b78d44fae2f63665c6f565cb286de365c280 · sha256:6d3029f0558f0014… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:196ac9a7517f59991848aeb5bd52b78d44fae2f63665c6f565cb286de365c280 · sha256:6d3029f0558f0014… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"tags":["vendor-advisory"],"url":"https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:196ac9a7517f59991848aeb5bd52b78d44fae2f63665c6f565cb286de365c280 · sha256:6d3029f0558f0014… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.