CVE-2026-52731
MEDIUM
6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Description
AI Translation Available
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an attacker authenticated to an enabled Zebra RPC endpoint can terminate zebrad by supplying a getblocktemplate LongPollId containing multi-byte UTF-8 characters. In zebra-rpc/src/methods/types/long_poll.rs, LongPollId::from_str originally checked the input byte length and then sliced fixed byte ranges to parse encoded fields. A slice boundary can land inside a multi-byte character and trigger Rust's byte index is not a char boundary panic. Zebra release builds use panic equals abort, so one malformed authenticated RPC request terminates the entire node process and can be repeated after restart. This issue is fixed in version 4.5.0.
248
Uncaught Exception
DraftCommon Consequences
Security Scopes Affected:
Availability
Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart
Read Application Data
Applicable Platforms
Languages:
C++, Java, C#
https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d4511755…
https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qv2r-v3mx-f4pf