{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32739 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-32739 is a medium-severity denial of service vulnerability in strukturag libheif, published on 19 May 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-2026-32739 and fix it if it is affected.\n\nWhat it is: CVE-2026-32739 is a medium-severity denial of service vulnerability in strukturag libheif, published on 19 May 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32739 exists.\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-2026-32739/ (Markdown: https://insights.sbomify.com/CVE-2026-32739/index.md)","id":"CVE-2026-32739","markdown":"https://insights.sbomify.com/CVE-2026-32739/index.md","name":"CVE-2026-32739","record":{"aliases":["ALPINE-CVE-2026-32739","BELL-CVE-2026-32739","DEBIAN-CVE-2026-32739","GHSA-j9g7-q9hv-gq8c","JLSEC-2026-571","ROOT-OS-DEBIAN-11-CVE-2026-32739","ROOT-OS-DEBIAN-12-CVE-2026-32739","UBUNTU-CVE-2026-32739"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"HEIF/AVIF decoder library","requires_auth":"none","summary":"A crafted HEIF file triggers an infinite loop in libheif, causing a denial of service by consuming 100% CPU during file parsing.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"libheif","vendor":"struktur"}],"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-835","name":"Loop with Unreachable Exit Condition"}],"description":"libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"libheif is Vulnerable to Infinite Loop DoS via stts Sample Duration Lookup","id":"CVE-2026-32739","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing","id":"CVE-2026-32740"},"packages":[],"prev":{"headline":"libheif has a Heap OOB Read/SEGV Crash via Zero samples_per_chunk","id":"CVE-2026-32738"},"products":["libheif"],"published":"2026-05-19","related":[{"cvss_score":8.8,"headline":"libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing","id":"CVE-2026-32740","kev_date_added":null,"published":"2026-05-19"},{"cvss_score":8.8,"headline":"Null dereference in n/a","id":"CVE-2023-49460","kev_date_added":null,"published":"2023-12-07"},{"cvss_score":8.8,"headline":"Null dereference in n/a","id":"CVE-2023-49462","kev_date_added":null,"published":"2023-12-07"},{"cvss_score":8.8,"headline":"Null dereference in n/a","id":"CVE-2023-49463","kev_date_added":null,"published":"2023-12-07"},{"cvss_score":8.8,"headline":"Null dereference in n/a","id":"CVE-2023-49464","kev_date_added":null,"published":"2023-12-07"},{"cvss_score":8.8,"headline":"Denial of service in n/a","id":"CVE-2020-19498","kev_date_added":null,"published":"2021-07-21"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2020-19499","kev_date_added":null,"published":"2021-07-21"}],"sources":[{"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-20","vendors":["strukturag"]},"summary":"A crafted HEIF file triggers an infinite loop in libheif, causing a denial of service by consuming 100% CPU during file parsing.","url":"https://insights.sbomify.com/CVE-2026-32739/"}