{"answers":{"affected":"1 open source package ship an affected version, including modsecurity. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30923 exists.","fix":"Upgrade modsecurity to 3.0.15 or later.","what":"CVE-2026-30923 is a high-severity denial of service vulnerability in owasp-modsecurity ModSecurity, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-30923 and fix it if it is affected.\n\nWhat it is: CVE-2026-30923 is a high-severity denial of service vulnerability in owasp-modsecurity ModSecurity, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30923 exists.\n\nAffected packages and fixed versions:\n- modsecurity (Bitnami): affected from 3.0.0; fixed in 3.0.15\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-30923/ (Markdown: https://insights.sbomify.com/CVE-2026-30923/index.md)","id":"CVE-2026-30923","markdown":"https://insights.sbomify.com/CVE-2026-30923/index.md","name":"CVE-2026-30923","record":{"aliases":["AZL-85715","BIT-modsecurity-2026-30923","DEBIAN-CVE-2026-30923","GHSA-qrjc-3jpc-3h2g","UBUNTU-CVE-2026-30923"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Web Application Firewall","requires_auth":"none","summary":"An attacker can crash web server worker processes by sending single-character query strings to rules using hexDecode, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"modsecurity","vendor":"owasp"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"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"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"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 before 3.0.15 of libModSecurity3 are affected. This has been patched in version 3.0.15.","ecosystems":["Bitnami"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"libModSecurity3 denial of service via segfault when using t:hexDecode on single-character query strings","id":"CVE-2026-30923","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"qui CORS Misconfiguration: Arbitrary Origins Trusted","id":"CVE-2026-30924"},"packages":[{"ecosystem":"Bitnami","fixed":["3.0.15"],"introduced":["3.0.0"],"last_affected":[],"package":"modsecurity","purl":"pkg:bitnami/modsecurity","source":"BIT-modsecurity-2026-30923"}],"prev":{"headline":"pyasn1 Vulnerable to Denial of Service via Unbounded Recursion","id":"CVE-2026-30922"},"products":["ModSecurity"],"published":"2026-05-05","related":[{"cvss_score":8.6,"headline":"Security feature bypass in ModSecurity","id":"CVE-2026-52747","kev_date_added":null,"published":"2026-07-10"},{"cvss_score":8.6,"headline":"WAF bypass of the ModSecurity v3 release line","id":"CVE-2024-1019","kev_date_added":null,"published":"2024-01-30"},{"cvss_score":8.2,"headline":"ModSecurity: Unsigned integer underflow in @verifySSN / @verifyCPF / @verifySVNR operators","id":"CVE-2026-42268","kev_date_added":null,"published":"2026-05-12"},{"cvss_score":7.5,"headline":"ModSecurity has possible DoS vulnerability in sanitiseArg action","id":"CVE-2025-48866","kev_date_added":null,"published":"2025-06-02"},{"cvss_score":7.5,"headline":"Trustwave ModSecurity 3.x before 3.0.10 has Inefficient Algorithmic Complexity.","id":"CVE-2023-38285","kev_date_added":null,"published":"2023-07-26"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2023-28882","kev_date_added":null,"published":"2023-04-28"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-05","vendors":["owasp-modsecurity"]},"summary":"An attacker can crash web server worker processes by sending single-character query strings to rules using hexDecode, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-30923/"}