{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-18453 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-18453 is a high-severity vulnerability in Red Hat Directory Server 11.5 E4S for RHEL 8, published on 7 Sep 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-2026-18453 and fix it if it is affected.\n\nWhat it is: CVE-2026-18453 is a high-severity vulnerability in Red Hat Directory Server 11.5 E4S for RHEL 8, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-18453 in the wild and no public exploit code.\n\nAffected product: Red Hat Directory Server 11.5 E4S for RHEL 8. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-18453/ (Markdown: https://insights.sbomify.com/CVE-2026-18453/index.md)","id":"CVE-2026-18453","markdown":"https://insights.sbomify.com/CVE-2026-18453/index.md","name":"CVE-2026-18453","record":{"aliases":["AZL-99974","DEBIAN-CVE-2026-18453","GHSA-42wr-8m7m-5j62","UBUNTU-CVE-2026-18453"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"LDAP directory server","requires_auth":"none","summary":"An unauthenticated remote attacker can crash the LDAP server by sending crafted search requests with the USE_ONE_BACKEND control, causing a denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Null dereference in Red Hat Directory Server 11.5 E4S for RHEL 8","id":"CVE-2026-18453","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":19,"next":{"headline":"Heap-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Buffers.","id":"CVE-2026-18457"},"packages":[],"prev":{"headline":"Rich Source｜DMS+ (Non-Mobile) - Use of Hard-coded Credentials","id":"CVE-2026-18452"},"products":["Red Hat Directory Server 11.5 E4S for RHEL 8","Red Hat Directory Server 11.7 E4S for RHEL 8","Red Hat Directory Server 11.9 for RHEL 8","Red Hat Directory Server 12","Red Hat Directory Server 12.2 E4S for RHEL 9","Red Hat Directory Server 12.4 E4S for RHEL 9","Red Hat Directory Server 13","Red Hat Directory Server 13.2","Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 10.0 Extended Update Support","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7 Extended Lifecycle Support","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","Red Hat Enterprise Linux 8.8 Telecommunications Update Service","Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions","Red Hat Enterprise Linux 9.6 Extended Update Support"],"published":"2026-09-07","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["Red Hat"]},"summary":"An unauthenticated remote attacker can crash the LDAP server by sending crafted search requests with the USE_ONE_BACKEND control, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-18453/"}