Reported

November 11, 2026

Issued

November 12, 2026

Package

vodozemac (crates.io)

Type

Vulnerability

Categories

• denial-of-service

Aliases

• GHSA-pqp6-f7wc-6498

References

• https://github.com/matrix-org/vodozemac/pull/453

Patched

• >=0.11.2

Affected Functions

Version

vodozemac::Ed25519PublicKey::from_base64

• <0.11.2

vodozemac::Ed25519SecretKey::from_base64

• <0.11.2

Description

In version 0.11.1 and earlier of vodozemac, Ed25519PublicKey::from_base64() and Ed25519SecretKey::from_base64() panic on malformed input instead of returning an error, if the input decodes to 31 or 33 bytes instead of the expected 32 bytes. An attacker who can supply a key to an application using vodozemac can crash it.

Impact

Ed25519 public keys are routinely received from other Matrix users and servers, so a malicious party can publish a crafted key that crashes clients parsing it.

The impact is limited to denial of service; no key disclosure or signature forgery is possible.

Advisory available under CC0-1.0 license.