AIKIDO-2026-454229
nostr is vulnerable to Denial of Service (DoS)
75
High Risk
This Affects:
nostrTL;DR
The legacy NIP-04 decryption routine in the nostr crate parses the initialization vector from the base64 ?iv= portion of untrusted message content. It converts the decoded bytes directly into a fixed 16-byte AES-CBC IV without checking the decoded length. When a Kind-4 encrypted message carries an IV whose decoded length is not 16 bytes, the conversion panics and crashes the decrypting task or process. The fix validates the decoded IV length (try_into to [u8; 16]) and returns an InvalidIVLen error instead of panicking.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your application decrypts NIP-04 (legacy Kind-4 encrypted direct message) content from untrusted senders.
Background info
nostr is vulnerable to Denial of Service (DoS) in versions 0.1.5 - 0.44.5.
How to fix this
Upgrade the nostr library to the patch version.
Are You Affected?
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