{"id":"CVE-2026-70635","state":"PUBLISHED","title":"TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Bulk Dictionary Decompression Negative Index","description":"TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability that allows authenticated attackers to cause query-result integrity failures or backend crashes by supplying a crafted Simple8b selector-11 value, which is stored in the signed int16 Arrow dictionary-index type and bypasses index validation checks in bulk text dictionary decompression. Attackers with direct DML access to a non-frozen physical compressed hypertable relation can trigger an out-of-bounds read before the base of the live offsets array through the VectorAgg single-text hashing strategy, resulting in incorrect aggregation output, backend SIGSEGV, or PostgreSQL crash recovery depending on build configuration.","publishedAt":"2026-08-06T16:54:37.899Z","updatedAt":"2026-08-14T16:51:36.125Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["timescale timescaledb"],"affected":[{"vendor":"timescale","product":"timescaledb","packageURL":"pkg:github/timescale/timescaledb","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.29.1","versionType":"semver"},{"version":"517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3","status":"unaffected","versionType":"git"}],"repo":"https://github.com/timescale/timescaledb"}],"references":["https://github.com/timescale/timescaledb/pull/10360","https://github.com/timescale/timescaledb/commit/517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3","https://www.vulncheck.com/advisories/timescaledb-out-of-bounds-read-dos-via-bulk-dictionary-decompression-negative-index"],"weaknesses":["CWE-129","CWE-125"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/70xxx/CVE-2026-70635.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-70635","state":"PUBLISHED","datePublished":"2026-08-06T16:54:37.899Z","dateUpdated":"2026-08-14T16:51:36.125Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-04T20:17:18.298Z"},"containers":{"cna":{"title":"TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Bulk Dictionary Decompression Negative Index","descriptions":[{"lang":"en","value":"TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability that allows authenticated attackers to cause query-result integrity failures or backend crashes by supplying a crafted Simple8b selector-11 value, which is stored in the signed int16 Arrow dictionary-index type and bypasses index validation checks in bulk text dictionary decompression. 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