CVE-2026-104436

Zebra before 4.5.0 contains an uncontrolled resource consumption vulnerability that allows remote P2P peers to exhaust blocking-pool threads by sending oversized block locator vectors. Attackers can send getblocks or getheaders messages with up to 65,535 locator hashes, triggering per-hash chain...

CVE-2026-104436

Zebra versions before 4.5.0 are susceptible to an uncontrolled resource consumption vulnerability. Remote P2P peers can exhaust blocking-pool threads by transmitting oversized block locator vectors, specifically by sending getblocks or getheaders messages containing up to 65,535 locator hashes . ...

CVE-2026-104436 Zebra before 4.5.0 CPU Amplification via Uncapped getblocks/getheaders Locator Length

Zebra before 4.5.0 contains an uncontrolled resource consumption vulnerability that allows remote P2P peers to exhaust blocking-pool threads by sending oversized block locator vectors. Attackers can send getblocks or getheaders messages with up to 65,535 locator hashes, triggering per-hash chain...

EUVD-2026-91446

Zebra before 4.5.0 contains an uncontrolled resource consumption vulnerability that allows remote P2P peers to exhaust blocking-pool threads by sending oversized block locator vectors. Attackers can send getblocks or getheaders messages with up to 65,535 locator hashes, triggering per-hash chain...

CVE-2026-104436: Allocation of Resources Without Limits or Throttling

Zebra before 4.5.0 contains an uncontrolled resource consumption vulnerability that allows remote P2P peers to exhaust blocking-pool threads by sending oversized block locator vectors. Attackers can send getblocks or getheaders messages with up to 65,535 locator hashes, triggering per-hash chain...

PT-2026-104246

Zebra before 4.5.0 contains an uncontrolled resource consumption vulnerability that allows remote P2P peers to exhaust blocking-pool threads by sending oversized block locator vectors. Attackers can send getblocks or getheaders messages with up to 65,535 locator hashes, triggering per-hash chain...

GHSA-443G-GWGP-49X4 zebrad vulnerable to getblocks/getheaders locator CPU amplification via uncapped vector length

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections. Summary The readgetblocks and readgetheaders codec paths accepted block locator vectors up to approximately 65,535 entries the generic TrustedPreallocate ceiling derived...

PT-2026-57590

Am I affected You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections. Summary The read getblocks and read getheaders codec paths accepted block locator vectors up to approximately 65,535 entries the generic TrustedPreallocate ceiling derive...

CVE-2026-34069 nimiq-consensus panics via RequestMacroChain micro-block locator

nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. In versions 1.2.2 and below, an unauthenticated p2p peer can cause the RequestMacroChain message handler task to panic. Sending a RequestMacroChain message where the...

CVE-2026-34069 nimiq-consensus panics via RequestMacroChain micro-block locator

nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. In versions 1.2.2 and below, an unauthenticated p2p peer can cause the RequestMacroChain message handler task to panic. Sending a RequestMacroChain message where the...

CVE-2026-34069

CVE-2026-34069 affects the Rust implementation of Nimiq’s PoS consensus (nimiq/core-rs-albatross). In versions 1.2.2 and earlier, an unauthenticated p2p peer can trigger a panic in the RequestMacroChain message handler when the first locator hash on the victim’s main chain is a micro block hash (...

EUVD-2026-22160

nimiq-consensus panics via RequestMacroChain micro-block locator...

GHSA-48M6-486P-9J8P nimiq-consensus panics via RequestMacroChain micro-block locator

Impact An unauthenticated p2p peer can cause the RequestMacroChain message handler task to panic by sending a RequestMacroChain message where the first locator hash that is on the victim’s main chain is a micro block hash not a macro block hash. In RequestMacroChain::handle, the handler selects t...