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RUSTSEC-2026-0229
No affected components available
The NIP-98 HTTP authorization parser Base64-decoded the complete authorization value and parsed the resulting JSON event without applying an application-level size limit. Both operations occurred before the event's signature and authorization fields could be validated.
An unauthenticated remote client could send an oversized Authorization: Nostr
header to a server using this parser. Each request caused memory allocation and
decoding and JSON parsing work proportional to the supplied value, allowing repeated
requests to consume server memory and CPU. The impact depends on any lower HTTP header
limit already enforced by the hosting server. The issue does not bypass NIP-98
authentication or disclose protected data.
The parser now rejects oversized encoded input before Base64 allocation and rejects decoded authorization events larger than 64 KiB before JSON parsing.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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