{"answers":{"affected":"3 open source packages ship an affected version, including thumbor.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53505 exists.","fix":"Upgrade thumbor to 7.8.0 or later.","what":"CVE-2026-53505 is a high-severity denial of service vulnerability in thumbor, published on 31 Jul 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-2026-53505 and fix it if it is affected.\n\nWhat it is: CVE-2026-53505 is a high-severity denial of service vulnerability in thumbor, published on 31 Jul 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-2026-53505 exists.\n\nAffected packages and fixed versions:\n- thumbor (PyPI): affected all versions; fixed in 7.8.0\n- thumbor (PyPI): affected all versions; fixed in 7.8.0\n- thumbor (PyPI): affected all versions; fixed in 7.8.0\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-2026-53505/ (Markdown: https://insights.sbomify.com/CVE-2026-53505/index.md)","id":"CVE-2026-53505","markdown":"https://insights.sbomify.com/CVE-2026-53505/index.md","name":"CVE-2026-53505","record":{"aliases":["DEBIAN-CVE-2026-53505","GHSA-phj3-59pf-cp83","PYSEC-2026-3621","UBUNTU-CVE-2026-53505"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Image thumbnail service","requires_auth":"none","summary":"An attacker can cause denial of service in Thumbor by triggering unbounded resizes via the proportion filter, exhausting CPU and memory resources.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","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-400","name":"Uncontrolled Resource Consumption"}],"description":"Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(\u003cvalue\u003e) filter does not enforce an upper bound on \u003cvalue\u003e and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS","id":"CVE-2026-53505","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Server-side request forgery in oasdiff-action","id":"CVE-2026-53507"},"packages":[{"ecosystem":"PyPI","fixed":["7.8.0"],"introduced":["0"],"last_affected":[],"package":"thumbor","purl":null,"source":"GHSA-phj3-59pf-cp83"},{"ecosystem":"PyPI","fixed":["7.8.0"],"introduced":["0"],"last_affected":[],"package":"thumbor","purl":"pkg:pypi/thumbor","source":"GHSA-phj3-59pf-cp83"},{"ecosystem":"PyPI","fixed":["7.8.0"],"introduced":["0"],"last_affected":[],"package":"thumbor","purl":"pkg:pypi/thumbor","source":"PYSEC-2026-3621"}],"prev":{"headline":"Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter","id":"CVE-2026-53504"},"products":["thumbor"],"published":"2026-07-31","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"2026-08-03","vendors":["thumbor"]},"summary":"An attacker can cause denial of service in Thumbor by triggering unbounded resizes via the proportion filter, exhausting CPU and memory resources.","url":"https://insights.sbomify.com/CVE-2026-53505/"}