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

What is CVE-2026-26014?

CVE-2026-26014 is a medium-severity vulnerability in pion dtls, published on 11 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-200

Which versions are affected by CVE-2026-26014?

11 open source packages ship an affected version, including github.com/pion/dtls/v3, github.com/pion/dtls and github.com/pion/dtls/v2. It affects 1 product.

Products include Pion Dtls.

How do I fix CVE-2026-26014?

Upgrade github.com/pion/dtls/v3 to a fixed version for your release line: 3.0.11 or 3.1.1.

Is CVE-2026-26014 being exploited?

There is no known exploitation of CVE-2026-26014 in the wild and no public exploit code.

Other vulnerabilities in pion dtls

• CVE-2019-20786 Improper Authenication in Pion DTLS Critical 9.8
• CVE-2022-29190 Header reconstruction method can be thrown into an infinite loop in Pion DTLS High 7.5
• CVE-2022-29222 Improper Certificate Validation in Pion DTLS Medium 5.9
• CVE-2022-29189 Buffer for inbound DTLS fragments has no limit Medium 5.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-77645, AZL-77649, DEBIAN-CVE-2026-26014, GHSA-9f3f-wv7r-qc8r, GO-2026-4479, MINI-4p8c-jvcq-q5q7 and 10 more.