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CVE-2026-30923

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Libmodsecurity is one component of the ModSecurity v3 project. A segmentation fault occurs when a rule using the t:hexDecode transformation inspects a query string parameter containing a single character. An attacker can exploit this to crash worker processes, causing a denial of service. Service resumes once the attack stops as worker processes recover from the segfault. All versions b
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2e5930c586dc9e58eaaafd01937f3fa9c537ddf7b82db6996f192086015e05d6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"ModSecurity","vendor":"owasp-modsecurity","versions":[{"status":"affected","version":"< 3.0.15"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1a0ea7847d31ccd69c05d50b72be7fb97c4531a09e7060d22acfc2bebe613a5b · sha256:bd0e5a9f7a48a1c8… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a0ea7847d31ccd69c05d50b72be7fb97c4531a09e7060d22acfc2bebe613a5b · sha256:bd0e5a9f7a48a1c8… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a0ea7847d31ccd69c05d50b72be7fb97c4531a09e7060d22acfc2bebe613a5b · sha256:bd0e5a9f7a48a1c8… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.15","tags":["x_refsource_MISC"],"url":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.15"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a0ea7847d31ccd69c05d50b72be7fb97c4531a09e7060d22acfc2bebe613a5b · sha256:bd0e5a9f7a48a1c8… · /containers/cna/references/1
{"name":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qrjc-3jpc-3h2g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qrjc-3jpc-3h2g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a0ea7847d31ccd69c05d50b72be7fb97c4531a09e7060d22acfc2bebe613a5b · sha256:bd0e5a9f7a48a1c8… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qrjc-3jpc-3h2g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a0ea7847d31ccd69c05d50b72be7fb97c4531a09e7060d22acfc2bebe613a5b · sha256:bd0e5a9f7a48a1c8… · /containers/adp/0/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.

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