# CVE-2025-66443: Denial of service in Infinity

> Attackers can cause a temporary denial of service in Pexip Infinity via improper input validation in WebRTC signalling when Direct Media is enabled.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Dec 2025
- **Updated:** 26 Dec 2025
- **Also known as:** GHSA-96px-f628-2m88

## What is CVE-2025-66443?

CVE-2025-66443 is a high-severity denial of service vulnerability in Pexip Pexip Infinity, published on 25 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Pexip Infinity 35.0 through 38.1 before 39.0, in non-default configurations that use Direct Media for WebRTC, has Improper Input Validation in signalling that allows an attacker to trigger a software abort, resulting in a temporary denial of service.

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2025-66443?

It affects 1 product.


Products: Pexip Pexip Infinity.

## How do I fix CVE-2025-66443?

No fix has been published for CVE-2025-66443 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-66443 being exploited?

There is no known exploitation of CVE-2025-66443 in the wild and no public exploit code.

## Other vulnerabilities in Pexip Pexip Infinity

- [CVE-2026-103110](https://insights.sbomify.com/CVE-2026-103110/): Memory corruption in Infinity (critical 9.8)
- [CVE-2020-11805](https://insights.sbomify.com/CVE-2020-11805/): Missing authorization in n/a (critical 9.8)
- [CVE-2015-4719](https://insights.sbomify.com/CVE-2015-4719/): Privilege escalation in n/a (critical 9.8)
- [CVE-2017-6551](https://insights.sbomify.com/CVE-2017-6551/): Other in n/a (critical 9.8)
- [CVE-2026-103105](https://insights.sbomify.com/CVE-2026-103105/): Missing authorization in Infinity (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-66443 and fix it if it is affected.

What it is: CVE-2025-66443 is a high-severity denial of service vulnerability in Pexip Pexip Infinity, published on 25 Dec 2025. 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-2025-66443 in the wild and no public exploit code.

Affected product: Pexip Pexip Infinity. 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-2025-66443/ (Markdown: https://insights.sbomify.com/CVE-2025-66443/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-66443
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-66443
- OSV: https://osv.dev/vulnerability/CVE-2025-66443

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-66443/
Summaries are generated and may contain mistakes; the official description above is the record.