{"items":[{"id":"NVI-00016124","kind":"vulnerability","title":"Pillow `BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading","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-45hq-cxwh-f6vc","CVE-2026-55379"],"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-3e17375330d26b256d83a05a2667513e"],"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":"2026-07-20T21:13:18.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-28482a8bc4ddd9e9fdc4c51f0511c736"},{"kind":"CVSS","as_of":"2026-10-25T20:10:00.147Z","value":"7.5 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-3e17375330d26b256d83a05a2667513e"}],"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-28482a8bc4ddd9e9fdc4c51f0511c736","url":"https://github.com/advisories/GHSA-45hq-cxwh-f6vc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-45hq-cxwh-f6vc","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T02:47:44.783Z"},{"id":"sr-3e17375330d26b256d83a05a2667513e","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55379","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-55379","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:48:26.418Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-28482a8bc4ddd9e9fdc4c51f0511c736"],"technology":"pillow","known_exclusions":[],"conditions_summary":"### Summary\n`PIL/BdfFontFile.py` `bdf_char()` (lines 84–88) reads the `BBX width height` field from a BDF font file and passes the dimensions directly to `Image.new()` without calling `Image._decompression_bomb_check()`. This completely bypasses Pillow's documented decompression bomb protection.\n\n`Image.open()` enforces `MAX_IMAGE_PIXELS = 89,478,485` and raises `DecompressionBombError` for images exceeding `2 × MAX = 178,956,970` pixels. The BDF font loading path calls `Image.new()` directly, which only calls `_check_size()` (validates `>= 0`) — no pixel count limit.\n\n**Vulnerable code (`PIL/BdfFontFile.py` lines 84–88):**\n```python\n# width, height from attacker-controlled \"BBX width height x y\" line\ntry:\n    im = Image.frombytes(\"1\", (width, height), bitmap, \"hex\", \"1\")\nexcept ValueError:\n    # TRIGGERED when BITMAP section is empty (zero hex lines)\n    im = Image.new(\"1\", (width, height))   # ← NO _decompression_bomb_check()!\n    # ^ This image is stored in self.glyph[ch] — persists in memory\n```\n\n**Attack trigger:** A BDF glyph with `BBX 20000 20000` and an empty `BITMAP` section causes `Image.frombytes()` to raise `ValueError`, then `Image.new(\"1\", (20000, 20000))` allocates *","public_affected_ranges":["< 12.3.0"]}],"null_published_at":"2026-11-08T19:53:44.051Z","source_updated_at":"2026-07-20T21:13:18.000Z","source_disclosed_at":"2026-07-20T21:13:18.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-04T02:47:44.783Z"},{"id":"NVI-00016124","kind":"vulnerability","title":"Pillow `BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-45hq-cxwh-f6vc","CVE-2026-55379"],"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-28482a8bc4ddd9e9fdc4c51f0511c736"],"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":"2026-07-20T21:13:18.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-28482a8bc4ddd9e9fdc4c51f0511c736"}],"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-28482a8bc4ddd9e9fdc4c51f0511c736","url":"https://github.com/advisories/GHSA-45hq-cxwh-f6vc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-45hq-cxwh-f6vc","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T02:47:44.783Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-28482a8bc4ddd9e9fdc4c51f0511c736"],"technology":"pillow","known_exclusions":[],"conditions_summary":"### Summary\n`PIL/BdfFontFile.py` `bdf_char()` (lines 84–88) reads the `BBX width height` field from a BDF font file and passes the dimensions directly to `Image.new()` without calling `Image._decompression_bomb_check()`. This completely bypasses Pillow's documented decompression bomb protection.\n\n`Image.open()` enforces `MAX_IMAGE_PIXELS = 89,478,485` and raises `DecompressionBombError` for images exceeding `2 × MAX = 178,956,970` pixels. The BDF font loading path calls `Image.new()` directly, which only calls `_check_size()` (validates `>= 0`) — no pixel count limit.\n\n**Vulnerable code (`PIL/BdfFontFile.py` lines 84–88):**\n```python\n# width, height from attacker-controlled \"BBX width height x y\" line\ntry:\n    im = Image.frombytes(\"1\", (width, height), bitmap, \"hex\", \"1\")\nexcept ValueError:\n    # TRIGGERED when BITMAP section is empty (zero hex lines)\n    im = Image.new(\"1\", (width, height))   # ← NO _decompression_bomb_check()!\n    # ^ This image is stored in self.glyph[ch] — persists in memory\n```\n\n**Attack trigger:** A BDF glyph with `BBX 20000 20000` and an empty `BITMAP` section causes `Image.frombytes()` to raise `ValueError`, then `Image.new(\"1\", (20000, 20000))` allocates *","public_affected_ranges":["< 12.3.0"]}],"null_published_at":"2026-11-04T10:04:27.895Z","source_updated_at":"2026-07-20T21:13:18.000Z","source_disclosed_at":"2026-07-20T21:13:18.000Z","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":"2026-11-04T02:47:44.783Z"}],"next_cursor":null,"snapshot_revision":"42594"}