Dashboard / CVE-2026-123559

CVE-2026-123559

HIGH
MEDIUM Priority: 0.03 BB Relevance: 77/100
Published: 2026-11-08 Modified: 2026-11-13 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

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

Description

Zebra before 7.0.0 contains an inefficient algorithmic complexity vulnerability that allows unauthenticated peers to exhaust verification threads by submitting transactions with many transparent inputs. Attackers can relay invalid transactions with tens of thousands of inputs, forcing quadratic ZIP-244 or ZIP-243 digest recomputation that stalls Rayon-backed block verification for minutes.

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

77 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.7 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.34%
Raw Score 0.003430
Percentile 28.3%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00343
2026-11-12
0.00343
2026-11-10
0.00343
2026-11-09
0.00343
2026-11-08
0.00343

Intelligence Sources

mitre ref →
nvd ref →

External Links