Dashboard / CVE-2026-104436

CVE-2026-104436

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 63/100
Published: 2026-10-02 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
AT: Present
VC: None
VI: None
VA: Low

Description

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 lookups that degrade block validation, RPC, and mempool performance.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
ZcashFoundation zebra 0 < 4.5.0
ZcashFoundation zebra 0 < 4.5.0
ZcashFoundation zebra-chain 0 < 8.0.0
ZcashFoundation zebra-chain 0 < 8.0.0

References & Advisories (2)

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

6.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.27%
Raw Score 0.002730
Percentile 19.7%
Date 2026-10-29

Intelligence Sources

mitre ref →
nvd ref →

External Links