# CVE-2026-29089: TimescaleDB uses untrusted search path during extension upgrade

> A malicious user can execute arbitrary code during extension upgrades by shadowing built-in functions if the search_path includes user-writable schemas.

- **Severity:** High 8.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Mar 2026
- **Updated:** 11 Mar 2026
- **Also known as:** GHSA-vgp2-jj5c-828m

## What is CVE-2026-29089?

CVE-2026-29089 is a high-severity code injection vulnerability in timescaledb, published on 6 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

TimescaleDB is a time-series database for high-performance real-time analytics packaged as a Postgres extension. From version 2.23.0 to 2.25.1, PostgreSQL uses the search_path setting to locate unqualified database objects (tables, functions, operators). If the search_path includes user-writable schemas a malicious user can create functions in that schema that shadow builtin postgres functions and will be called instead of the postgres functions leading to arbitrary code execution during extension upgrade. This issue has been patched in version 2.25.2.

Weakness: CWE-426 (Untrusted Search Path)

## Which versions are affected by CVE-2026-29089?

It affects 1 product.


Products: Timescale Timescaledb.

## How do I fix CVE-2026-29089?

No fix has been published for CVE-2026-29089 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-29089 being exploited?

There is no known exploitation of CVE-2026-29089 in the wild and no public exploit code.

## Other vulnerabilities in timescaledb

- [CVE-2023-25149](https://insights.sbomify.com/CVE-2023-25149/): TimescaleDB has incorrect access control (high 8.8)
- [CVE-2022-24128](https://insights.sbomify.com/CVE-2022-24128/): Privilege escalation in n/a (high 8.0)
- [CVE-2026-70634](https://insights.sbomify.com/CVE-2026-70634/): TimescaleDB 2.29.1 Out-of-Bounds Read Information Disclosure via Dictionary Compression Reverse Iterator (high 7.2)
- [CVE-2026-70633](https://insights.sbomify.com/CVE-2026-70633/): TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Gorilla Compression Reverse Iterator (high 7.1)
- [CVE-2026-70635](https://insights.sbomify.com/CVE-2026-70635/): TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Bulk Dictionary Decompression Negative Index (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-29089 and fix it if it is affected.

What it is: CVE-2026-29089 is a high-severity code injection vulnerability in timescaledb, published on 6 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-29089 in the wild and no public exploit code.

Affected product: timescaledb. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-29089/ (Markdown: https://insights.sbomify.com/CVE-2026-29089/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-29089
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-29089
- OSV: https://osv.dev/vulnerability/CVE-2026-29089

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-29089/
Summaries are generated and may contain mistakes; the official description above is the record.