{"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-2026-53500 exists.","fix":"Upgrade thumbor to 7.8.0 or later.","what":"CVE-2026-53500 is a high-severity server-side request forgery 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-2026-53500 and fix it if it is affected.\n\nWhat it is: CVE-2026-53500 is a high-severity server-side request forgery 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-2026-53500 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-2026-53500/ (Markdown: https://insights.sbomify.com/CVE-2026-53500/index.md)","id":"CVE-2026-53500","markdown":"https://insights.sbomify.com/CVE-2026-53500/index.md","name":"CVE-2026-53500","record":{"aliases":["DEBIAN-CVE-2026-53500","GHSA-6x26-6r6f-m537","PYSEC-2026-3617","UBUNTU-CVE-2026-53500"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Thumbor image service","requires_auth":"none","summary":"Attackers can bypass hostname allowlists in Thumbor by exploiting unescaped regex patterns in ALLOWED_SOURCES, enabling unauthorized server-side requests.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"description":"Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. 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 treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot","id":"CVE-2026-53500","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Thumbor has HMAC validation bypass via multiple .replace() calls when removing URL signature","id":"CVE-2026-53501"},"packages":[{"ecosystem":"PyPI","fixed":["7.8.0"],"introduced":["0"],"last_affected":[],"package":"thumbor","purl":null,"source":"GHSA-6x26-6r6f-m537"},{"ecosystem":"PyPI","fixed":["7.8.0"],"introduced":["0"],"last_affected":[],"package":"thumbor","purl":"pkg:pypi/thumbor","source":"GHSA-6x26-6r6f-m537"},{"ecosystem":"PyPI","fixed":["7.8.0"],"introduced":["0"],"last_affected":[],"package":"thumbor","purl":"pkg:pypi/thumbor","source":"PYSEC-2026-3617"}],"prev":{"headline":"FORT-validator Vulnerable to RRDP Shared Snapshot Cache Poisoning","id":"CVE-2026-53499"},"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":"2026-07-31","vendors":["thumbor"]},"summary":"Attackers can bypass hostname allowlists in Thumbor by exploiting unescaped regex patterns in ALLOWED_SOURCES, enabling unauthorized server-side requests.","url":"https://insights.sbomify.com/CVE-2026-53500/"}