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CVE-2026-70635— TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Bulk Dictionary Decompression Negative Index

Quick assessment

Affected
timescale timescaledb
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TimescaleDB是TimescaleDB公司的一款提供时序数据高效处理的数据库扩展。 TimescaleDB 2.29.1及之前版本存在安全漏洞，该漏洞源于提供特制的Simple8b selector-11值，该值存储在signed int16 Arrow字典索引类型中，绕过批量文本字典解压的索引验证检查，可能导致已认证攻击者触发越界读取，造成查询结果完整性失败或后端崩溃。

CVSS 7.1 · High EPSS 0.44% · P37

Affected Version Matrix 2

VendorProduct Version RangeStatus
timescale timescaledb ≤ 2.29.1 affected
517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3 unaffected
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I. Basic Information for CVE-2026-70635

Vulnerability Information
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Vulnerability Title
TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Bulk Dictionary Decompression Negative Index
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
TimescaleDB 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TimescaleDB是TimescaleDB公司的一款提供时序数据高效处理的数据库扩展。 TimescaleDB 2.29.1及之前版本存在安全漏洞，该漏洞源于提供特制的Simple8b selector-11值，该值存储在signed int16 Arrow字典索引类型中，绕过批量文本字典解压的索引验证检查，可能导致已认证攻击者触发越界读取，造成查询结果完整性失败或后端崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
timescale timescaledb 0 ~ 2.29.1 -

II. Public POCs for CVE-2026-70635

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 6869 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-70635

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Patches & Fixes for CVE-2026-70635 (2)

Vendor Advisories for CVE-2026-70635 (1)

Same Patch Batch · timescale · 2026-08-06 · 3 CVEs total

CVE-2026-70634 8.1 HIGH TimescaleDB 2.29.1 Out-of-Bounds Read Information Disclosure via Dictionary Compression Re
CVE-2026-70633 6.5 MEDIUM TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Gorilla Compression Reverse Iterator

IV. Related Vulnerabilities

Same product: timescaledb
Same vendor: timescale
Same weakness: CWE-129

V. Comments for CVE-2026-70635

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