What’s Vulnerable › Vulnerabilities

CVE-2026-26014: Pion DTLS uses random nonce generation with AES GCM ciphers risks leaking the authentication key

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-11 · updated 2026-06-17
• Weakness: CWE-200

Description

Pion DTLS is a Go implementation of Datagram Transport Layer Security. Pion DTLS versions v1.0.0 through v3.0.10 and 3.1.0 use random nonce generation with AES GCM ciphers, which makes it easier for remote attackers to obtain the authentication key and spoof data by leveraging the reuse of a nonce in a session and a "forbidden attack". Upgrade to v3.0.11, v3.1.1, or later.

Affected products

• pion dtls: before 3.1.0 — fixed in 3.1.0

How to fix

Upgrade to a fixed version: pion dtls 3.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/pion/dtls/commit/61762dee8217991882c5eb79856b9e7a73ee349f
• https://github.com/pion/dtls/commit/90e241cfec2985715efdd3d005972847462a67d6
• https://github.com/pion/dtls/pull/796
• https://github.com/pion/dtls/releases/tag/v3.0.11
• https://github.com/pion/dtls/releases/tag/v3.1.1
• https://github.com/pion/dtls/security/advisories/GHSA-9f3f-wv7r-qc8r

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