{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-34085 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-34085 is a medium-severity memory corruption vulnerability in fontconfig, published on 25 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34085 and fix it if it is affected.\n\nWhat it is: CVE-2026-34085 is a medium-severity memory corruption vulnerability in fontconfig, published on 25 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-34085 in the wild and no public exploit code.\n\nAffected product: fontconfig. 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-2026-34085/ (Markdown: https://insights.sbomify.com/CVE-2026-34085/index.md)","id":"CVE-2026-34085","markdown":"https://insights.sbomify.com/CVE-2026-34085/index.md","name":"CVE-2026-34085","record":{"aliases":["GHSA-jxv8-p782-98cx","JLSEC-2026-79","RHSA-2026:13722"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"fontconfig library","requires_auth":"none","summary":"An off-by-one error in fontconfig allows attackers to trigger a one-byte out-of-bounds write, potentially leading to code execution or crashes.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"fontconfig","vendor":"fontconfig_project"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-193","name":"Off-by-one Error"}],"description":"fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.","ecosystems":["Red Hat:hummingbird:1"],"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":"Memory corruption in fontconfig","id":"CVE-2026-34085","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"AbuseFilter misuses ::userCanBitfield, exposing access-controlled information","id":"CVE-2026-34086"},"packages":[{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.17.1-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"fontconfig","purl":"pkg:rpm/redhat/fontconfig","source":"RHSA-2026:13722"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.17.1-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"fontconfig-devel","purl":"pkg:rpm/redhat/fontconfig-devel","source":"RHSA-2026:13722"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.17.1-0.1.hum1"],"introduced":["0"],"last_affected":[],"package":"fontconfig-devel-doc","purl":"pkg:rpm/redhat/fontconfig-devel-doc","source":"RHSA-2026:13722"}],"prev":{"headline":"PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::load","id":"CVE-2026-34084"},"products":["fontconfig"],"published":"2026-03-25","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-02","vendors":["fontconfig project"]},"summary":"An off-by-one error in fontconfig allows attackers to trigger a one-byte out-of-bounds write, potentially leading to code execution or crashes.","url":"https://insights.sbomify.com/CVE-2026-34085/"}