Dashboard / CVE-2026-123557

CVE-2026-123557

HIGH
MEDIUM Priority: 0.03 BB Relevance: 66/100
Published: 2026-11-08 Modified: 2026-11-10 First seen: 2026-11-08 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: High

Description

ZcashFoundation Zebra zebrad before 7.0.0 contains a reachable assertion race condition that allows unauthenticated remote peers to abort the node by triggering disconnection during a blocked outbound send. Malicious peers can return empty FindBlocks or FindHeaders replies and stop reading their socket, dropping an unresolved MustUseClientResponseSender and terminating syncing nodes.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
ZcashFoundation zebra 0 < 7.0.0
ZcashFoundation zebra 0 < 7.0.0

References & Advisories (2)

Bug Bounty Relevance

66 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

8.2 / 10.0 v4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.31%
Raw Score 0.003080
Percentile 23.9%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00308
2026-11-12
0.00308
2026-11-10
0.00308
2026-11-09
0.00308
2026-11-08
0.00308

Intelligence Sources

mitre ref →
nvd ref →

External Links