TI-2021-20786 Aliases CVE-2021-45699 GHSA-2969-8hh9-57jc

An issue was discovered in the ckb crate before 0.40.0 for Rust.

LOW 36CWE-770Published 2021-12-26 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

An issue was discovered in the ckb crate before 0.40.0 for Rust. Remote attackers may be able to conduct a 51% attack against the Nervos CKB blockchain by triggering an inability to allocate memory for the misbehavior HashMap.

Why it matters now

EPSS 0.01515 74th percentileScored 2026-11-07

Fix Fixed ckb (crates.io): 0.40.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA
—	ckb (crates.io)	before 0.40.0	0.40.0	Patch available	GHSA-2969-8hh9-57jc

— Vendor— Affected all versions Fixed in — No fix listed CNA
ckb (crates.io) Vendor— Affected before 0.40.0 Fixed in 0.40.0 Patch available GHSA-2969-8hh9-57jc

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:nervos:ckb::::::rust::*	before 0.40.0	Vulnerable	Nervos

cpe:2.3:a:nervos:ckb:*:*:*:*:*:rust:*:* Versions before 0.40.0 Vulnerable ·Nervos

Remediation

Fix · GHSA-2969-8hh9-57jc ckb (crates.io) Fixed in 0.40.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-45699
2026-10-03 Alias added: GHSA-2969-8hh9-57jc

References

Advisory 3

Other 2

TI-2021-20785 An issue was discovered in the ckb crate before 0.40.0 for Rust. CVSS 3.1CRITICAL 9.8
TI-2021-20787 An issue was discovered in the ckb crate before 0.40.0 for Rust. CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences