CVE-2026-70633

TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability in the Gorilla compression reverse row iterator that allows authenticated attackers to cause a denial of service by storing a crafted compressed datum with an internally inconsistent BitArray. Attackers with DML access to a compressed hypertable can trigger an unsigned integer wraparound in the reverse iterator bucket index computation, causing a read beyond the end of the bucket array, resulting in a SIGSEGV crash that can be repeatedly triggered on each subsequent reverse-order scan.

CVSS 4.0

7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-25)

CWEs

CWE-125, CWE-191

Published

2026-08-06

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• timescale:timescaledb

References

• https://github.com/timescale/timescaledb/commit/517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3
• https://github.com/timescale/timescaledb/pull/10360
• https://www.vulncheck.com/advisories/timescaledb-out-of-bounds-read-dos-via-gorilla-compression-reverse-iterator

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