# CVE-2026-25994: PJSIP has a heap buffer overflow in ICE with long username

> A heap buffer overflow in PJSIP's ICE session allows attackers to execute arbitrary code or cause denial of service via long usernames.

- **Severity:** High 8.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Feb 2026
- **Updated:** 12 Feb 2026
- **Also known as:** ALPINE-CVE-2026-25994, DEBIAN-CVE-2026-25994, GHSA-j29p-pvh2-pvqp, UBUNTU-CVE-2026-25994

## What is CVE-2026-25994?

CVE-2026-25994 is a high-severity memory corruption vulnerability in pjsip pjproject, published on 11 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a buffer overflow vulnerability exists in PJNATH ICE Session when processing credentials with excessively long usernames.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2026-25994?

It affects 1 product.


Products: Pjsip Pjsip.

## How do I fix CVE-2026-25994?

Upgrade to a fixed version.

## Is CVE-2026-25994 being exploited?

There is no known exploitation of CVE-2026-25994 in the wild and no public exploit code.

Public exploit code:

- PJSIP cve-2026-25994 BUFFER OVERFLOW POC (github_poc): https://github.com/VABISMO/cve-2026-25994_PJSIP
- PJPROJECT 2.16 - Heap Bufferoverflow (exploitdb)

## Other vulnerabilities in pjsip pjproject

- [CVE-2026-28799](https://insights.sbomify.com/CVE-2026-28799/): PJSIP: Heap use-after-free in PJSIP presence subscription termination handler (high 8.7)
- [CVE-2026-29068](https://insights.sbomify.com/CVE-2026-29068/): PJSIP: Stack buffer overflow in Opus codec parser (high 8.7)
- [CVE-2026-40614](https://insights.sbomify.com/CVE-2026-40614/): PJSIP: Heap buffer overflow in Opus codec decoding (high 8.5)
- [CVE-2026-32945](https://insights.sbomify.com/CVE-2026-32945/): PJSIP is vulnerable to Heap-based Buffer Overflow through DNS parser (high 8.4)
- [CVE-2026-40892](https://insights.sbomify.com/CVE-2026-40892/): PJSIP: Stack buffer overflow in pjsip_auth_create_digest2() (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25994 and fix it if it is affected.

What it is: CVE-2026-25994 is a high-severity memory corruption vulnerability in pjsip pjproject, published on 11 Feb 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-2026-25994 in the wild and no public exploit code.

Affected product: pjsip pjproject. 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-2026-25994/ (Markdown: https://insights.sbomify.com/CVE-2026-25994/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25994
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25994
- OSV: https://osv.dev/vulnerability/CVE-2026-25994

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25994/
Summaries are generated and may contain mistakes; the official description above is the record.