# CVE-2026-15607: tanstack db Alias Path select.ts select prototype pollution

> Remote attackers can exploit prototype pollution in TanStack DB to execute arbitrary code or escalate privileges.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Jul 2026
- **Updated:** 15 Jul 2026
- **Also known as:** GHSA-m7mf-xqv5-gg8f

## What is CVE-2026-15607?

CVE-2026-15607 is a medium-severity code injection vulnerability in tanstack db, published on 13 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was detected in tanstack db up to 0.6.8. Affected by this vulnerability is the function select of the file src/query/compiler/select.ts of the component Alias Path Handler. The manipulation results in improperly controlled modification of object prototype attributes. The attack may be launched remotely. The exploit is now public and may be used. The patch is identified as ac09b1177a100eafa85cba3cd09dd1f53f933ded. A patch should be applied to remediate this issue.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-1321 (Improperly Controlled Modification of Object Prototype Attributes)

## Which versions are affected by CVE-2026-15607?


## How do I fix CVE-2026-15607?

No fix has been published for CVE-2026-15607 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15607 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15607 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15607 and fix it if it is affected.

What it is: CVE-2026-15607 is a medium-severity code injection vulnerability in tanstack db, published on 13 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15607 exists.

Affected product: tanstack db. 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-2026-15607/ (Markdown: https://insights.sbomify.com/CVE-2026-15607/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15607
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15607
- OSV: https://osv.dev/vulnerability/CVE-2026-15607

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15607/
Summaries are generated and may contain mistakes; the official description above is the record.