{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-84451 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-84451 is a medium-severity vulnerability in strukturag libheif, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-84451 and fix it if it is affected.\n\nWhat it is: CVE-2026-84451 is a medium-severity vulnerability in strukturag libheif, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-84451 in the wild and no public exploit code.\n\nAffected product: strukturag libheif. 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-2026-84451/ (Markdown: https://insights.sbomify.com/CVE-2026-84451/index.md)","id":"CVE-2026-84451","markdown":"https://insights.sbomify.com/CVE-2026-84451/index.md","name":"CVE-2026-84451","record":{"aliases":["BELL-CVE-2026-84451","DEBIAN-CVE-2026-84451","ECHO-b83b-0aa6-1414","GHSA-hh47-fhqr-cj2r","MINI-rcf5-9mpp-8976"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"HEIF/AVIF image library","requires_auth":"none","summary":"An integer overflow in libheif allows attackers to cause a denial of service via crafted uncompressed tile grids, requiring an upgrade to the latest version.","user_interaction":"required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.3, the no-icef full-item branch of unc_decoder::get_compressed_image_data_uncompressed() in libheif/codecs/uncompressed/unc_decoder.cc retains an addition-based range check that can wrap when a crafted uncompressed tile grid produces a large range_start_offset and range_size. The overflow makes the bounds comparison pass and allows heif_image_handle_decode_image_tile() to call memcpy() with an invalid source pointer and a very large length when decoding a valid high-index advertised tile. This incomplete remediation of CVE-2026-62292 can reliably crash tile-processing applications, while whole-image decoding is not claimed to reach the demonstrated path. This issue is fixed in version 1.23.3.","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":"libheif: Incomplete fix for CVE-2026-62292 leaves libheif vulnerable to an out-of-bounds read","id":"CVE-2026-84451","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Windows ML CLI: CORS misconfig enables localhost RCE","id":"CVE-2026-84452"},"packages":[],"prev":{"headline":"libheif: `clap` + oversized `ispe` aborts on an assert in `Fraction::Fraction` (incomplete fix for CVE-2026-62289)","id":"CVE-2026-84450"},"products":["libheif"],"published":"2026-09-18","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-24","vendors":["strukturag"]},"summary":"An integer overflow in libheif allows attackers to cause a denial of service via crafted uncompressed tile grids, requiring an upgrade to the latest version.","url":"https://insights.sbomify.com/CVE-2026-84451/"}