{"items":[{"id":"NVI-00015124","kind":"vulnerability","title":"Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-phj3-59pf-cp83","CVE-2026-53505"],"plain_summary":"GitHub lists this reviewed advisory for thumbor. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-49bab35d313421d2dd3ed949dd165fae"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-31T19:00:45.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2765340f0e6804dca543a375fc027931"},{"kind":"CVSS","as_of":"2026-09-08T20:51:43.490Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-49bab35d313421d2dd3ed949dd165fae"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2765340f0e6804dca543a375fc027931","url":"https://github.com/advisories/GHSA-phj3-59pf-cp83","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-phj3-59pf-cp83","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:58:33.950Z"},{"id":"sr-49bab35d313421d2dd3ed949dd165fae","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53505","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-53505","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:48:05.462Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2765340f0e6804dca543a375fc027931"],"technology":"thumbor","known_exclusions":[],"conditions_summary":"### Summary\nThumbor's `filters:proportion()` filter does not enforce an upper bound on `` and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service.\n\n### Details\n- Filter implementation: `thumbor/filters/proportion.py`\n  - `value` is parsed as a float (`BaseFilter.DecimalNumber`) with no maximum.\n  - The filter computes `new_width = source_width * value` and `new_height = source_height * value` and then calls `engine.resize(new_width, new_height)`.\n- Execution phase: `proportion` runs in the default POST_TRANSFORM phase (after the main transform pipeline). This means it can effectively bypass request-level size clamping that happens earlier in the request lifecycle (e.g., `MAX_WIDTH`/`MAX_HEIGHT` applied to `req.width/req.height`).\n\nDocumentation states the `percentage` argument should be `0.0 to 1.0` (`docs/proportion.rst`), but the implementation does not enforce this constraint.\n\n### PoC\n#### Preconditions\n- The `proportion` filter is enabled (it is enabled by default via `BUILTIN_FILTERS`).\n- Either:\n  - `/unsafe/` URLs are allowed (`ALLOW_UNSAFE_URL=True`, common default in some deplo","public_affected_ranges":["<= 7.7.7"]}],"null_published_at":"2026-11-08T19:53:44.055Z","source_updated_at":"2026-07-31T19:00:45.000Z","source_disclosed_at":"2026-07-31T19:00:44.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T09:58:33.950Z"},{"id":"NVI-00015124","kind":"vulnerability","title":"Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-phj3-59pf-cp83","CVE-2026-53505"],"plain_summary":"GitHub lists this reviewed advisory for thumbor. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2765340f0e6804dca543a375fc027931"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-31T19:00:45.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2765340f0e6804dca543a375fc027931"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2765340f0e6804dca543a375fc027931","url":"https://github.com/advisories/GHSA-phj3-59pf-cp83","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-phj3-59pf-cp83","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:58:33.950Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2765340f0e6804dca543a375fc027931"],"technology":"thumbor","known_exclusions":[],"conditions_summary":"### Summary\nThumbor's `filters:proportion()` filter does not enforce an upper bound on `` and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service.\n\n### Details\n- Filter implementation: `thumbor/filters/proportion.py`\n  - `value` is parsed as a float (`BaseFilter.DecimalNumber`) with no maximum.\n  - The filter computes `new_width = source_width * value` and `new_height = source_height * value` and then calls `engine.resize(new_width, new_height)`.\n- Execution phase: `proportion` runs in the default POST_TRANSFORM phase (after the main transform pipeline). This means it can effectively bypass request-level size clamping that happens earlier in the request lifecycle (e.g., `MAX_WIDTH`/`MAX_HEIGHT` applied to `req.width/req.height`).\n\nDocumentation states the `percentage` argument should be `0.0 to 1.0` (`docs/proportion.rst`), but the implementation does not enforce this constraint.\n\n### PoC\n#### Preconditions\n- The `proportion` filter is enabled (it is enabled by default via `BUILTIN_FILTERS`).\n- Either:\n  - `/unsafe/` URLs are allowed (`ALLOW_UNSAFE_URL=True`, common default in some deplo","public_affected_ranges":["<= 7.7.7"]}],"null_published_at":"2026-11-03T10:03:26.551Z","source_updated_at":"2026-07-31T19:00:45.000Z","source_disclosed_at":"2026-07-31T19:00:44.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T09:58:33.950Z"}],"next_cursor":null,"snapshot_revision":"42594"}