{"items":[{"id":"NVI-00010701","kind":"vulnerability","title":"Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-332p-7hrc-92wf","CVE-2026-112393"],"plain_summary":"GitHub lists this reviewed advisory for Pillow. 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-5734eeae570da08b55247219aa95725c"],"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":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"1.019%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.63401. Missing scores are unknown.","source_id":"sr-5734eeae570da08b55247219aa95725c"}],"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-b3fe17b0812d0a5bfc21365db69cc3f4","url":"https://github.com/advisories/GHSA-332p-7hrc-92wf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-332p-7hrc-92wf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"},{"id":"sr-5734eeae570da08b55247219aa95725c","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-112393","publisher":"FIRST EPSS","observed_at":"2026-10-31T23:13:27.688Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b3fe17b0812d0a5bfc21365db69cc3f4"],"technology":"Pillow","known_exclusions":[],"conditions_summary":"```\n============================================================================\nHeap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO\nLocation: src/libImaging/TiffDecode.c:94  in _tiffWriteProc()\nCommit:   a707c6b21c313880d0771e54965d142dd42358b6\n============================================================================\n```\n\nPillow can write attacker-chosen data past the end of a heap buffer when it saves a TIFF image to an in-memory destination such as `io.BytesIO` rather than to a file. The same code also copies leftover heap memory from the process into the saved file. Anyone who can supply an image to a service that opens it and re-saves it as TIFF this way can trigger this with default settings. The attached reproducer crashes the process, and the overflow could potentially be developed further, but code execution is not demonstrated here.\n\nThe bug is in `_tiffWriteProc` in `src/libImaging/TiffDecode.c`. This is the write callback for the in-memory sink that Pillow gives libtiff whenever the save target has no `fileno()`. While writing the directory, libtiff seeks past the current end of data and writes tag values there. `_tiffWriteProc` sizes its `realloc()` f","public_affected_ranges":[">= 2.0.0, < 13.0.0"]}],"null_published_at":"2026-11-01T07:29:08.038Z","source_updated_at":"2026-10-21T21:28:09.000Z","source_disclosed_at":"2026-10-21T21:28:09.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T22:07:30.906Z"},{"id":"NVI-00010701","kind":"vulnerability","title":"Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-332p-7hrc-92wf","CVE-2026-112393"],"plain_summary":"GitHub lists this reviewed advisory for Pillow. 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-b3fe17b0812d0a5bfc21365db69cc3f4"],"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":[],"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-b3fe17b0812d0a5bfc21365db69cc3f4","url":"https://github.com/advisories/GHSA-332p-7hrc-92wf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-332p-7hrc-92wf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b3fe17b0812d0a5bfc21365db69cc3f4"],"technology":"Pillow","known_exclusions":[],"conditions_summary":"```\n============================================================================\nHeap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO\nLocation: src/libImaging/TiffDecode.c:94  in _tiffWriteProc()\nCommit:   a707c6b21c313880d0771e54965d142dd42358b6\n============================================================================\n```\n\nPillow can write attacker-chosen data past the end of a heap buffer when it saves a TIFF image to an in-memory destination such as `io.BytesIO` rather than to a file. The same code also copies leftover heap memory from the process into the saved file. Anyone who can supply an image to a service that opens it and re-saves it as TIFF this way can trigger this with default settings. The attached reproducer crashes the process, and the overflow could potentially be developed further, but code execution is not demonstrated here.\n\nThe bug is in `_tiffWriteProc` in `src/libImaging/TiffDecode.c`. This is the write callback for the in-memory sink that Pillow gives libtiff whenever the save target has no `fileno()`. While writing the directory, libtiff seeks past the current end of data and writes tag values there. `_tiffWriteProc` sizes its `realloc()` f","public_affected_ranges":[">= 2.0.0, < 13.0.0"]}],"null_published_at":"2026-10-31T22:27:12.376Z","source_updated_at":"2026-10-21T21:28:09.000Z","source_disclosed_at":"2026-10-21T21:28:09.000Z","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":"2026-10-31T22:07:30.906Z"}],"next_cursor":null,"snapshot_revision":"42594"}