{"items":[{"id":"NVI-00015396","kind":"vulnerability","title":"re2: Out-of-bounds heap read in `exec`/`test`/`match` via attacker-influenced `lastIndex` on a non-ASCII subject → uncatchable process crash (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-ff84-5f28-78qj","CVE-2026-67550"],"plain_summary":"GitHub lists this reviewed advisory for re2. 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-0013fc7812a4b5c0d9587c6aebda4a0f"],"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":"2026-07-31T16:53:16.000Z","value":"5.7 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6403b3f1889991c9f82669c0bd4f466d"},{"kind":"CVSS","as_of":"2026-10-23T22:10:00.160Z","value":"5.7 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-0013fc7812a4b5c0d9587c6aebda4a0f"}],"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-6403b3f1889991c9f82669c0bd4f466d","url":"https://github.com/advisories/GHSA-ff84-5f28-78qj","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-ff84-5f28-78qj","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:58:49.818Z"},{"id":"sr-0013fc7812a4b5c0d9587c6aebda4a0f","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67550","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-67550","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T15:07:43.109Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6403b3f1889991c9f82669c0bd4f466d"],"technology":"re2","known_exclusions":[],"conditions_summary":"## Summary\n\n`re2` validates the user-settable `lastIndex` against the subject's **UTF-8 byte length** but then uses it as a **UTF-16 code-unit count** to walk the subject buffer, with no bounds check. For any non-ASCII subject, the byte length is larger than the true character count, so a `lastIndex` between those two values passes validation while pointing past the end of the buffer. The subsequent walk reads out of bounds. With a large subject the read marches into unmapped memory and the process dies with **SIGABRT/SIGSEGV** — an uncatchable crash (`try/catch` cannot stop it), i.e. a denial of service for any worker/process that runs the match. In some cases the out-of-bounds bytes are copied into the returned value (a bounded, best-effort heap information leak).\n\n## Root cause\n\nThe subject wrapper stores the UTF-8 **byte** length in `StrVal::length`:\n\n- `lib/addon.cc:200` `auto argLength = utf8Length(s, isolate);` — UTF-8 **byte** count\n- `lib/addon.cc:209` `lastStringValue.reset(buffer, argSize, argLength, startFrom, false, isAscii);`\n\n`setIndex` then validates the (UTF-16) `lastIndex` against that byte length and walks the buffer by character count:\n\n```cpp\n// lib/addon.cc:22","public_affected_ranges":["<= 1.25.1"]}],"null_published_at":"2026-11-08T19:53:44.014Z","source_updated_at":"2026-07-31T16:53:16.000Z","source_disclosed_at":"2026-07-31T16:53:16.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-03T09:58:49.818Z"},{"id":"NVI-00015396","kind":"vulnerability","title":"re2: Out-of-bounds heap read in `exec`/`test`/`match` via attacker-influenced `lastIndex` on a non-ASCII subject → uncatchable process crash (DoS)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-ff84-5f28-78qj","CVE-2026-67550"],"plain_summary":"GitHub lists this reviewed advisory for re2. 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-6403b3f1889991c9f82669c0bd4f466d"],"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":"2026-07-31T16:53:16.000Z","value":"5.7 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6403b3f1889991c9f82669c0bd4f466d"}],"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-6403b3f1889991c9f82669c0bd4f466d","url":"https://github.com/advisories/GHSA-ff84-5f28-78qj","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-ff84-5f28-78qj","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:58:49.818Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6403b3f1889991c9f82669c0bd4f466d"],"technology":"re2","known_exclusions":[],"conditions_summary":"## Summary\n\n`re2` validates the user-settable `lastIndex` against the subject's **UTF-8 byte length** but then uses it as a **UTF-16 code-unit count** to walk the subject buffer, with no bounds check. For any non-ASCII subject, the byte length is larger than the true character count, so a `lastIndex` between those two values passes validation while pointing past the end of the buffer. The subsequent walk reads out of bounds. With a large subject the read marches into unmapped memory and the process dies with **SIGABRT/SIGSEGV** — an uncatchable crash (`try/catch` cannot stop it), i.e. a denial of service for any worker/process that runs the match. In some cases the out-of-bounds bytes are copied into the returned value (a bounded, best-effort heap information leak).\n\n## Root cause\n\nThe subject wrapper stores the UTF-8 **byte** length in `StrVal::length`:\n\n- `lib/addon.cc:200` `auto argLength = utf8Length(s, isolate);` — UTF-8 **byte** count\n- `lib/addon.cc:209` `lastStringValue.reset(buffer, argSize, argLength, startFrom, false, isAscii);`\n\n`setIndex` then validates the (UTF-16) `lastIndex` against that byte length and walks the buffer by character count:\n\n```cpp\n// lib/addon.cc:22","public_affected_ranges":["<= 1.25.1"]}],"null_published_at":"2026-11-03T10:03:31.362Z","source_updated_at":"2026-07-31T16:53:16.000Z","source_disclosed_at":"2026-07-31T16:53:16.000Z","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":"2026-11-03T09:58:49.818Z"}],"next_cursor":null,"snapshot_revision":"42594"}