{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33721 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-33721 is a medium-severity memory corruption vulnerability in MapServer, published on 27 Mar 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-2026-33721 and fix it if it is affected.\n\nWhat it is: CVE-2026-33721 is a medium-severity memory corruption vulnerability in MapServer, published on 27 Mar 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-2026-33721 exists.\n\nAffected product: MapServer. 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-2026-33721/ (Markdown: https://insights.sbomify.com/CVE-2026-33721/index.md)","id":"CVE-2026-33721","markdown":"https://insights.sbomify.com/CVE-2026-33721/index.md","name":"CVE-2026-33721","record":{"aliases":["DEBIAN-CVE-2026-33721","GHSA-cv4m-mr84-fgjp","UBUNTU-CVE-2026-33721","openSUSE-SU-2026:10452-1","openSUSE-SU-2026:20476-1"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"GIS server","requires_auth":"none","summary":"A heap buffer overflow in MapServer's SLD parser allows remote attackers to crash the service via crafted WMS requests.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"mapserver","vendor":"osgeo"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"MapServer is a system for developing web-based GIS applications. Starting in version 4.2 and prior to version 8.6.1, a heap-buffer-overflow write in MapServer’s SLD (Styled Layer Descriptor) parser lets a remote, unauthenticated attacker crash the MapServer process by sending a crafted SLD with more than 100 Threshold elements inside a ColorMap/Categorize structure (commonly reachable via WMS GetMap with SLD_BODY). Version 8.6.1 patches the issue.","ecosystems":["openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"MapServer has heap buffer overflow in SLD `Categorize` Threshold parsing","id":"CVE-2026-33721","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":1,"n_references":2,"next":{"headline":"n8n Has External Secrets Authorization Bypass in Credential Saving","id":"CVE-2026-33722"},"packages":[{"ecosystem":"openSUSE:Tumbleweed","fixed":["8.6.1-1.1"],"introduced":["0"],"last_affected":[],"package":"mapserver","purl":"pkg:rpm/opensuse/mapserver\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:10452-1"}],"prev":{"headline":"n8n Has Authorization Bypass in OAuth Callback via N8N_SKIP_AUTH_ON_OAUTH_CALLBACK","id":"CVE-2026-33720"},"products":["MapServer"],"published":"2026-03-27","related":[{"cvss_score":10,"headline":"Security feature bypass in n/a","id":"CVE-2010-2540","kev_date_added":null,"published":"2010-08-02"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-2281","kev_date_added":null,"published":"2009-10-23"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-0839","kev_date_added":null,"published":"2009-03-31"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-0840","kev_date_added":null,"published":"2009-03-31"},{"cvss_score":10,"headline":"Path traversal in n/a","id":"CVE-2009-0841","kev_date_added":null,"published":"2009-03-31"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-1176","kev_date_added":null,"published":"2009-03-31"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-1177","kev_date_added":null,"published":"2009-03-31"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"2026-04-17","vendors":["MapServer"]},"summary":"A heap buffer overflow in MapServer's SLD parser allows remote attackers to crash the service via crafted WMS requests.","url":"https://insights.sbomify.com/CVE-2026-33721/"}