CVE-2026-109365CWE-345

CVE-2026-109365

Low · published October 12, 2026

CVSS v3.1
3.7
EPSS
0%
Percentile
3.9
In the wild
Unconfirmed
What it is

Zebra before 6.4.0 contains an uncontrolled resource consumption vulnerability that allows unauthenticated peers to force full proof verification by serving forged block bodies with valid header hashes. Attackers can flip authorizing-only bytes such as a coinbase scriptSig, wasting Sapling, Orchard, and Ironwood proof verification without penalty and stalling sync for 67 seconds.

The record
Technical detail
CVSS v3.1
3.7 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
6.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00150 · 3.9th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2026-10-12T21:17Z
References (2)
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-3c94-hf7p-g5mf · [email protected]https://www.vulncheck.com/advisories/zebra-before-6.4.0-denial-of-service-via-same-hash-forged-block-bodies · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:05Z
    Zebra before 6.4.0 Denial of Service via Same-Hash Forged Block Bodies
    cvelistv5
  • 12 OCT 16:05Z
    Zebra before 6.4.0 Denial of Service via Same-Hash Forged Block Bodies
    cvelistv5