CVE-2026-58262Disclosure

LOWCVSS 7.1 · HIGH

Signal is active with 3 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS aggregate-signature check, so a malicious or compromised block producer can set them to reach the required quorum while gathering fewer genuine validator signatures than the protocol demands. As a result, nodes that import or intercept the header accept it as correctly signed without a real two-thirds quorum, weakening consensus safety and undermining finality. This issue is fixed in version 1.7.20.

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0.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-345CWE-347

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

Patch or workaround signal is available
3 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 3 signals
Disclosure: 2 classified signals
General: 1 classified signal
3 total mentions across 1 day

Deep dive

Activity timeline3 mentions / 1d

Signal classification2 categories

Disclosure

266.7%

General

133.3%

Referenced assets2 URLs

By indicator

Full discourse3 posts

CyberSignal | Cybersecurity News@XQOPTRX45d
Disclosure
⛓️ Klever blockchain consensus vulnerability disclosed CVE-2026-58262 affects Klever-Go before 1.7.20. A flaw in validator-quorum calculation can count unused bitmap padding bits toward the required two-thirds quorum, potentially allowing blocks to appear sufficiently signed when they are not. ✅ Fixed in 1.7.20. 🔎 Source: MITRE CVE / VulDB. #Blockchain #Klever #CVE #CyberSecurity #Web3Security
Post summary
The tweet announces CVE‑2026‑58262, details a quorum calculation flaw in Klever‑Go, and notes the patch in version 1.7.20.
30000110
34 followersView on X
CVE@CVEnew46d
Disclosure
CVE-2026-58262 Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitm… https://www.cve.org/CVERecord?id=CVE-2026-58262
Post summary
CVE-2026-58262 is disclosed as a bug in Klever-Go's header signature verification involving unused padding bits; no PoC, exploit, patch, or active exploitation details are provided.
01000971
57.9K followersView on X
Infoflowcloud@infoflowcloud46d
General
🚨*CVE* CVE-2026-58262 Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, header signature verification counts the unused padding bits of the PubKeysBitm… https://www.cve.org/CVERecord?id=CVE-2026-58262 ----- Traducción: CVE-2026-58262 Kle… http://infoflow.cloud`
Post summary
The post links to the CVE record and briefly describes a flaw in header signature verification, but provides no exploit, patch, or real‑world usage information.
0000044
98 followersView on X

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