CVE-2026-104431
Last modified
CVE-2026-104431 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Zebra before 6.0.0 contains a denial of service vulnerability that allows unauthenticated peers to stall Tokio workers by submitting mempool transactions requiring expensive synchronous script verification. Attackers can send non-standard high-sigop P2SH transactions that reach CachedFfiTransaction::is_valid() before standardness checks, saturating the verifier buffer and rendering the node unresponsive..
Description
Zebra before 6.0.0 contains a denial of service vulnerability that allows unauthenticated peers to stall Tokio workers by submitting mempool transactions requiring expensive synchronous script verification. Attackers can send non-standard high-sigop P2SH transactions that reach CachedFfiTransaction::is_valid() before standardness checks, saturating the verifier buffer and rendering the node unresponsive.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| ZcashFoundation | zebra | < 6.0.0 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-104431?
How severe is CVE-2026-104431?
How do I fix CVE-2026-104431?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-104425ZcashFoundation Zebra before 6.1.0 contains a resource exhau…5.3
- CVE-2026-104426Zebra before 6.1.0 contains an inefficient algorithmic compl…5.9
- CVE-2026-104427Zebra before 6.1.0 contains an incomplete cleanup vulnerabil…5.9
- CVE-2026-104428The getblock RPC method in zebra-rpc before 11.0.0, used by …5.3
- CVE-2026-104429Zebra (zebrad) 5.0.0 before 6.0.0-rc.0 does not apply its pe…5.3
- CVE-2026-104430Zebra zebrad 4.5.0 and zebra-script 7.0.0 count P2SH redeem …7.5
- CVE-2026-104432Zebra before 6.3.0 contains an improper exceptional conditio…5.3
- CVE-2026-104433Mooncake transfer engine before 0.3.12 contains an out-of-bo…7.5
- CVE-2026-104434ZcashFoundation Zebra zebra-rpc before 8.0.0 and zebrad befo…6.5
- CVE-2026-104435Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a …7.4
- CVE-2026-104436Zebra before 4.5.0 contains an uncontrolled resource consump…3.7
- CVE-2026-104437Zebra before 4.4.0 contains a consensus divergence vulnerabi…7.4
Are you affected by CVE-2026-104431?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST