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Tracking
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-4fc2-h7jh-287c | zebrad has mempool transaction admission denial via single-peer inbound queue saturation |
Tue, 18 Aug 2026 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Zcashfoundation
Zcashfoundation zebra |
|
| Vendors & Products |
Zcashfoundation
Zcashfoundation zebra |
Tue, 18 Aug 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 18 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, one unauthenticated P2P peer can monopolize all 25 MAX_INBOUND_CONCURRENCY slots in Zebra's inbound mempool download and verification pipeline. In zebrad/src/components/mempool/downloads.rs, the bounded queue was shared globally without per-peer accounting, while peer identity was not carried through Gossip and FullQueue responses were mapped to Response::Nil instead of reaching overload disconnection handling. An attacker can advertise fake transaction identifiers and remain silent so each task holds a slot until TRANSACTION_DOWNLOAD_TIMEOUT, then periodically refill the queue as slots expire. While saturated, honest peer transactions and local sendrawtransaction requests are rejected with MempoolError::FullQueue, although block validation and synchronization continue. This issue is fixed in version 4.5.0. | |
| Title | ZEBRA: Mempool transaction admission denial via single-peer inbound queue saturation | |
| Weaknesses | CWE-770 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-08-18T19:32:31.103Z
Reserved: 2026-06-08T14:00:43.572Z
Link: CVE-2026-52732
Updated: 2026-08-18T19:32:27.989Z
Status : Received
Published: 2026-08-18T20:17:16.710
Modified: 2026-08-18T20:17:16.710
Link: CVE-2026-52732
No data.
OpenCVE Enrichment
Updated: 2026-08-18T21:00:04Z
Github GHSA