CVE-2026-70635

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/timescale/timescaledb/commit/517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3	Patch
https://github.com/timescale/timescaledb/pull/10360	Issue Tracking Patch
https://www.vulncheck.com/advisories/timescaledb-out-of-bounds-read-dos-via-bulk-dictionary-decompression-negative-index	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:timescale:timescaledb:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-06 22:18

Updated : 2026-09-01 15:31

NVD link : CVE-2026-70635

Mitre link : CVE-2026-70635

CVE.ORG link : CVE-2026-70635

JSON object : View

Products Affected

timescale

timescaledb

CWE

CWE-125

Out-of-bounds Read

CWE-129

Improper Validation of Array Index

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