# CVE-2025-71377: stoatchat before 20250210-1 Unrestricted Message History Fetch

> Remote unauthenticated attackers can cause denial of service and exfiltrate message history by exploiting a logic error in message fetching limits.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jul 2026
- **Updated:** 20 Jul 2026
- **Also known as:** GHSA-6j45-2pq3-r728, GHSA-h7h6-7pxm-mc66

## What is CVE-2025-71377?

CVE-2025-71377 is a high-severity denial of service vulnerability in stoatchat, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

stoatchat (delta) versions before 20250210-1 (0.8.2) contain a logic error in the query messages route. When fetching messages 'nearby' another message, the database query can be given a message limit of zero, which the database interprets as 'no limit'. A remote unauthenticated attacker can craft nearby message fetch requests to download an entire channel's message history in a single expensive request, and can send many such requests in parallel, resulting in denial of service through resource exhaustion.

Weakness: CWE-1025 (Comparison Using Wrong Factors)

## Which versions are affected by CVE-2025-71377?


## How do I fix CVE-2025-71377?

No fix has been published for CVE-2025-71377 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-71377 being exploited?

There is no known exploitation of CVE-2025-71377 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-71377 and fix it if it is affected.

What it is: CVE-2025-71377 is a high-severity denial of service vulnerability in stoatchat, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-71377 in the wild and no public exploit code.

Affected product: stoatchat. 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-2025-71377/ (Markdown: https://insights.sbomify.com/CVE-2025-71377/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-71377
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-71377
- OSV: https://osv.dev/vulnerability/CVE-2025-71377

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-71377/
Summaries are generated and may contain mistakes; the official description above is the record.