{"items":[{"id":"NVI-00008999","kind":"vulnerability","title":"compress zstd: Panic on two-block frames","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-fpmh-frq8-7rj8","CVE-2026-116591"],"plain_summary":"GitHub lists this reviewed advisory for github.com/klauspost/compress/zstd. 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-21d06f8dcadf54b21a40c9d081a7fbe9"],"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":"2026-11-03T12:00:27.000Z","value":"0.333%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.26535. Missing scores are unknown.","source_id":"sr-21d06f8dcadf54b21a40c9d081a7fbe9"}],"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-6b08f779d4c9cb16eedb0b870d8584e2","url":"https://github.com/advisories/GHSA-fpmh-frq8-7rj8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-fpmh-frq8-7rj8","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"},{"id":"sr-21d06f8dcadf54b21a40c9d081a7fbe9","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-2026-116591","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.777Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6b08f779d4c9cb16eedb0b870d8584e2"],"technology":"github.com/klauspost/compress/zstd","known_exclusions":[],"conditions_summary":"### Summary\n\nA crafted ~27 KB two-block zstd frame makes DecodeAll and the streaming decoder panic with an out-of-range slice index instead of returning a decode error. The same bytes decode fine with the reference zstd. Any program that decompresses untrusted zstd input can be crashed by it. Reproduced on v1.20.0 and v1.20.1.\n\nReleased in https://github.com/klauspost/compress/releases/tag/v1.20.2\n\n### Details\n\n The panic is in the FSE decoder that `huff0.ReadTable` uses to read a block's Huffman-weight table. Three conditions have to hold at once, and the crafted frame arranges all three.\n\n  **1. A count that doesn't fit is accepted.** `readNCount` permits a tableLog up to 15 (`tablelogAbsoluteMax`, checked at `fse/decompress.go:54`), so a symbol's normalized count can reach 32768 (2^15). The count is stored in an `int16` at `fse/decompress.go:126`, where 32768 wraps to −32768. The validation only looks at the `int32` running totals (`remaining` and `gotTot","public_affected_ranges":["<= 1.20.1"]}],"null_published_at":"2026-11-07T14:01:55.429Z","source_updated_at":"2026-10-27T15:38:16.000Z","source_disclosed_at":"2026-10-27T15:38:14.000Z","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":"2026-10-31T21:56:51.534Z"},{"id":"NVI-00008999","kind":"vulnerability","title":"compress zstd: Panic on two-block frames","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-fpmh-frq8-7rj8","CVE-2026-116591"],"plain_summary":"GitHub lists this reviewed advisory for github.com/klauspost/compress/zstd. 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-1337c964251a03a4ec29ceaf14b455d7"],"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":"0.333%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.26488. Missing scores are unknown.","source_id":"sr-1337c964251a03a4ec29ceaf14b455d7"}],"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-6b08f779d4c9cb16eedb0b870d8584e2","url":"https://github.com/advisories/GHSA-fpmh-frq8-7rj8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-fpmh-frq8-7rj8","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"},{"id":"sr-1337c964251a03a4ec29ceaf14b455d7","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-2026-116591","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.843Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6b08f779d4c9cb16eedb0b870d8584e2"],"technology":"github.com/klauspost/compress/zstd","known_exclusions":[],"conditions_summary":"### Summary\n\nA crafted ~27 KB two-block zstd frame makes DecodeAll and the streaming decoder panic with an out-of-range slice index instead of returning a decode error. The same bytes decode fine with the reference zstd. Any program that decompresses untrusted zstd input can be crashed by it. Reproduced on v1.20.0 and v1.20.1.\n\nReleased in https://github.com/klauspost/compress/releases/tag/v1.20.2\n\n### Details\n\n The panic is in the FSE decoder that `huff0.ReadTable` uses to read a block's Huffman-weight table. Three conditions have to hold at once, and the crafted frame arranges all three.\n\n  **1. A count that doesn't fit is accepted.** `readNCount` permits a tableLog up to 15 (`tablelogAbsoluteMax`, checked at `fse/decompress.go:54`), so a symbol's normalized count can reach 32768 (2^15). The count is stored in an `int16` at `fse/decompress.go:126`, where 32768 wraps to −32768. The validation only looks at the `int32` running totals (`remaining` and `gotTot","public_affected_ranges":["<= 1.20.1"]}],"null_published_at":"2026-11-04T10:04:47.615Z","source_updated_at":"2026-10-27T15:38:16.000Z","source_disclosed_at":"2026-10-27T15:38:14.000Z","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":"2026-10-31T21:56:51.534Z"},{"id":"NVI-00008999","kind":"vulnerability","title":"compress zstd: Panic on two-block frames","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-fpmh-frq8-7rj8","CVE-2026-116591"],"plain_summary":"GitHub lists this reviewed advisory for github.com/klauspost/compress/zstd. 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-2d5d3c762c2d4c56ead43adc69f47258"],"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":"0.333%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.26512. Missing scores are unknown.","source_id":"sr-2d5d3c762c2d4c56ead43adc69f47258"}],"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-6b08f779d4c9cb16eedb0b870d8584e2","url":"https://github.com/advisories/GHSA-fpmh-frq8-7rj8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-fpmh-frq8-7rj8","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"},{"id":"sr-2d5d3c762c2d4c56ead43adc69f47258","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-2026-116591","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6b08f779d4c9cb16eedb0b870d8584e2"],"technology":"github.com/klauspost/compress/zstd","known_exclusions":[],"conditions_summary":"### Summary\n\nA crafted ~27 KB two-block zstd frame makes DecodeAll and the streaming decoder panic with an out-of-range slice index instead of returning a decode error. The same bytes decode fine with the reference zstd. Any program that decompresses untrusted zstd input can be crashed by it. Reproduced on v1.20.0 and v1.20.1.\n\nReleased in https://github.com/klauspost/compress/releases/tag/v1.20.2\n\n### Details\n\n The panic is in the FSE decoder that `huff0.ReadTable` uses to read a block's Huffman-weight table. Three conditions have to hold at once, and the crafted frame arranges all three.\n\n  **1. A count that doesn't fit is accepted.** `readNCount` permits a tableLog up to 15 (`tablelogAbsoluteMax`, checked at `fse/decompress.go:54`), so a symbol's normalized count can reach 32768 (2^15). The count is stored in an `int16` at `fse/decompress.go:126`, where 32768 wraps to −32768. The validation only looks at the `int32` running totals (`remaining` and `gotTot","public_affected_ranges":["<= 1.20.1"]}],"null_published_at":"2026-10-31T22:27:15.278Z","source_updated_at":"2026-10-27T15:38:16.000Z","source_disclosed_at":"2026-10-27T15:38:14.000Z","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":"2026-10-31T21:56:51.534Z"},{"id":"NVI-00008999","kind":"vulnerability","title":"compress zstd: Panic on two-block frames","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-fpmh-frq8-7rj8","CVE-2026-116591"],"plain_summary":"GitHub lists this reviewed advisory for github.com/klauspost/compress/zstd. 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-6b08f779d4c9cb16eedb0b870d8584e2"],"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-6b08f779d4c9cb16eedb0b870d8584e2","url":"https://github.com/advisories/GHSA-fpmh-frq8-7rj8","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-fpmh-frq8-7rj8","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6b08f779d4c9cb16eedb0b870d8584e2"],"technology":"github.com/klauspost/compress/zstd","known_exclusions":[],"conditions_summary":"### Summary\n\nA crafted ~27 KB two-block zstd frame makes DecodeAll and the streaming decoder panic with an out-of-range slice index instead of returning a decode error. The same bytes decode fine with the reference zstd. Any program that decompresses untrusted zstd input can be crashed by it. Reproduced on v1.20.0 and v1.20.1.\n\nReleased in https://github.com/klauspost/compress/releases/tag/v1.20.2\n\n### Details\n\n The panic is in the FSE decoder that `huff0.ReadTable` uses to read a block's Huffman-weight table. Three conditions have to hold at once, and the crafted frame arranges all three.\n\n  **1. A count that doesn't fit is accepted.** `readNCount` permits a tableLog up to 15 (`tablelogAbsoluteMax`, checked at `fse/decompress.go:54`), so a symbol's normalized count can reach 32768 (2^15). The count is stored in an `int16` at `fse/decompress.go:126`, where 32768 wraps to −32768. The validation only looks at the `int32` running totals (`remaining` and `gotTot","public_affected_ranges":["<= 1.20.1"]}],"null_published_at":"2026-10-31T22:13:27.126Z","source_updated_at":"2026-10-27T15:38:16.000Z","source_disclosed_at":"2026-10-27T15:38:14.000Z","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":"2026-10-31T21:56:51.534Z"}],"next_cursor":null,"snapshot_revision":"42594"}