CVE-2026-70635Public exploit

Backend crash via unchecked dictionary index

Published Aug 6, 2026 · Updated Aug 6, 2026

Out-of-bounds read in TimescaleDB 2.29.1 and earlier allows remote authenticated users to crash PostgreSQL via malformed compressed data. Bulk text dictionary decompression stores a crafted Simple8b selector-11 value in a signed int16 index, then reads before the offsets array because the index is not rejected. Exploitation requires direct DML access to a non-frozen compressed hypertable relation and can produce incorrect aggregation output, a backend SIGSEGV, or PostgreSQL crash recovery.

CVSS severityUnavailable
Unscored
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in TimescaleDB 2.29.1 and earlier allows remote authenticated users to crash PostgreSQL via malformed compressed data. Bulk text dictionary decompression stores a crafted Simple8b selector-11 value in a signed int16 index, then reads before the offsets array because the index is not rejected. Exploitation requires direct DML access to a non-frozen compressed hypertable relation and can produce incorrect aggregation output, a backend SIGSEGV, or PostgreSQL crash recovery.

The record

CVE
CVE-2026-70635
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Timescale, Inc.
Product
TimescaleDB
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.29.1

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Timescale, Inc. · TimescaleDBversion=0 <=2.29.1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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