{"items":[{"id":"NVI-00010631","kind":"vulnerability","title":"Pillow: Decompression bomb check bypass in SpiderImagePlugin.seek() leads to unbounded allocation DoS","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g842-9rc4-69pw","CVE-2026-96637"],"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-0ad8e340f13400d11bae4fa9bd0f4307"],"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":"2026-11-02T12:00:30.000Z","value":"0.373%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.3126. Missing scores are unknown.","source_id":"sr-0ad8e340f13400d11bae4fa9bd0f4307"}],"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-775f3fe8dbeefb25bdb20fad5b231d18","url":"https://github.com/advisories/GHSA-g842-9rc4-69pw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g842-9rc4-69pw","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"},{"id":"sr-0ad8e340f13400d11bae4fa9bd0f4307","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-2026-96637","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:17:01.146Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-775f3fe8dbeefb25bdb20fad5b231d18"],"technology":"pillow","known_exclusions":[],"conditions_summary":"## Summary\nSpiderImagePlugin's seek() bypasses the decompression bomb check, allowing a tiny (<1KB) crafted SPIDER stack file to trigger a multi-gigabyte allocation on im.load().\n\n## Affected versions\nAll versions up to and including current HEAD (v13.0.0.dev0, commit e7a7ea84)\n\n## Root cause\nImage.open() runs Image._decompression_bomb_check(im.size) exactly once, in _open_core (src/PIL/Image.py:3668), right after the initial _open(). \n\nSPIDER stack files are multi-frame: SpiderImageFile.seek(frame) (SpiderImagePlugin.py:179-190) computes an attacker-influenced stkoffset and calls self._open() AGAIN directly (line 190) — NOT through Image.open(). _open() re-parses a fresh 27-float header at that offset and reassigns:\n\n    self._size = int(h[12]), int(h[2])      # SpiderImagePlugin.py:131\n\nstraight from unvalidated header floats (isSpiderHeader only checks internal labrec*lenbyt==labbyt consistency, never bounds nsam/nrow). No bomb check runs on this new size.\n\nOn the subsequent load(), ImageFile.load_prepare() (ImageFile.py:436-437) executes `self.im = Image.core.new(self.mode, self.size)` with the unchecked, attacker-chosen size. Mode is always \"F\" (4 bytes/pixel), so e.g. 40000x4","public_affected_ranges":["< 13.0.0"]}],"null_published_at":"2026-11-03T17:49:15.038Z","source_updated_at":"2026-10-22T15:57:18.000Z","source_disclosed_at":"2026-10-22T15:57:17.000Z","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-00010631","kind":"vulnerability","title":"Pillow: Decompression bomb check bypass in SpiderImagePlugin.seek() leads to unbounded allocation DoS","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g842-9rc4-69pw","CVE-2026-96637"],"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-759f634cfaaefcf64fc8ffbbc6690069"],"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":"0.373%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.31271. Missing scores are unknown.","source_id":"sr-759f634cfaaefcf64fc8ffbbc6690069"}],"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-775f3fe8dbeefb25bdb20fad5b231d18","url":"https://github.com/advisories/GHSA-g842-9rc4-69pw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g842-9rc4-69pw","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"},{"id":"sr-759f634cfaaefcf64fc8ffbbc6690069","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-2026-96637","publisher":"FIRST EPSS","observed_at":"2026-10-31T23:13:27.701Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-775f3fe8dbeefb25bdb20fad5b231d18"],"technology":"pillow","known_exclusions":[],"conditions_summary":"## Summary\nSpiderImagePlugin's seek() bypasses the decompression bomb check, allowing a tiny (<1KB) crafted SPIDER stack file to trigger a multi-gigabyte allocation on im.load().\n\n## Affected versions\nAll versions up to and including current HEAD (v13.0.0.dev0, commit e7a7ea84)\n\n## Root cause\nImage.open() runs Image._decompression_bomb_check(im.size) exactly once, in _open_core (src/PIL/Image.py:3668), right after the initial _open(). \n\nSPIDER stack files are multi-frame: SpiderImageFile.seek(frame) (SpiderImagePlugin.py:179-190) computes an attacker-influenced stkoffset and calls self._open() AGAIN directly (line 190) — NOT through Image.open(). _open() re-parses a fresh 27-float header at that offset and reassigns:\n\n    self._size = int(h[12]), int(h[2])      # SpiderImagePlugin.py:131\n\nstraight from unvalidated header floats (isSpiderHeader only checks internal labrec*lenbyt==labbyt consistency, never bounds nsam/nrow). No bomb check runs on this new size.\n\nOn the subsequent load(), ImageFile.load_prepare() (ImageFile.py:436-437) executes `self.im = Image.core.new(self.mode, self.size)` with the unchecked, attacker-chosen size. Mode is always \"F\" (4 bytes/pixel), so e.g. 40000x4","public_affected_ranges":["< 13.0.0"]}],"null_published_at":"2026-11-03T10:03:21.794Z","source_updated_at":"2026-10-22T15:57:18.000Z","source_disclosed_at":"2026-10-22T15:57:17.000Z","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-00010631","kind":"vulnerability","title":"Pillow: Decompression bomb check bypass in SpiderImagePlugin.seek() leads to unbounded allocation DoS","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g842-9rc4-69pw","CVE-2026-96637"],"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-775f3fe8dbeefb25bdb20fad5b231d18"],"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-775f3fe8dbeefb25bdb20fad5b231d18","url":"https://github.com/advisories/GHSA-g842-9rc4-69pw","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g842-9rc4-69pw","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-775f3fe8dbeefb25bdb20fad5b231d18"],"technology":"pillow","known_exclusions":[],"conditions_summary":"## Summary\nSpiderImagePlugin's seek() bypasses the decompression bomb check, allowing a tiny (<1KB) crafted SPIDER stack file to trigger a multi-gigabyte allocation on im.load().\n\n## Affected versions\nAll versions up to and including current HEAD (v13.0.0.dev0, commit e7a7ea84)\n\n## Root cause\nImage.open() runs Image._decompression_bomb_check(im.size) exactly once, in _open_core (src/PIL/Image.py:3668), right after the initial _open(). \n\nSPIDER stack files are multi-frame: SpiderImageFile.seek(frame) (SpiderImagePlugin.py:179-190) computes an attacker-influenced stkoffset and calls self._open() AGAIN directly (line 190) — NOT through Image.open(). _open() re-parses a fresh 27-float header at that offset and reassigns:\n\n    self._size = int(h[12]), int(h[2])      # SpiderImagePlugin.py:131\n\nstraight from unvalidated header floats (isSpiderHeader only checks internal labrec*lenbyt==labbyt consistency, never bounds nsam/nrow). No bomb check runs on this new size.\n\nOn the subsequent load(), ImageFile.load_prepare() (ImageFile.py:436-437) executes `self.im = Image.core.new(self.mode, self.size)` with the unchecked, attacker-chosen size. Mode is always \"F\" (4 bytes/pixel), so e.g. 40000x4","public_affected_ranges":["< 13.0.0"]}],"null_published_at":"2026-10-31T22:27:09.626Z","source_updated_at":"2026-10-22T15:57:18.000Z","source_disclosed_at":"2026-10-22T15:57:17.000Z","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"}