ANT-2026-7R9KHDAS · cloudflare/circl · Signature Verification Bypass / Universal Forgery

other critical Severity Claude critical · Security research firm - · Maintainer - REPORT Anthropic's analysis of this finding, sealed at approval. ANT-2026-7R9KHDAS: CIRCL sign/bls: universal signature forgery in KeyG2SigG1 via G1-infinity point In the KeyG2SigG1 configuration of...

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 PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS...

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 PubKeysBitmap toward the two-thirds validator quorum. These padding bits do not correspond to any validator and are ignored by the actual BLS...

CVE-2026-58262 Klever-Go: PubKeysBitmap padding bits bypass the BLS signature quorum

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...

PT-2026-69155

Name of the Vulnerable Software and Affected Versions Klever-Go versions prior to 1.7.20 Description Header signature verification incorrectly counts unused padding bits of the PubKeysBitmap toward the two-thirds validator quorum. Because these padding bits do not correspond to any validator and...

CVE-2026-34065

CVE-2026-34065 affects nimiq-primitives in Nimiq’s Rust implementation. Before version 1.3.0, an untrusted p2p peer could cause a node to panic by announcing an election macro block whose validators set includes an invalid compressed BLS voting key. Hashing the election macro header hashes the va...

GHSA-PF4J-PF3W-95F9 nimiq-transaction: UpdateValidator transactions allows voting key change without proof-of-knowledge

Impact The staking contract accepts UpdateValidator transactions that set newvotingkey=Some... while omitting newproofofknowledge. this skips the proof-of-knowledge requirement that is needed to prevent BLS rogue-key attacks when public keys are aggregated. Because tendermint macro block...

CVE-2026-33471: Improper Input Validation

nimiq-block contains block primitives to be used in Nimiq's Rust implementation. SkipBlockProof::verify computes its quorum check using BitSet.len, then iterates BitSet indices and casts each usize index to u16 slot as u16 for slot lookup. Prior to version 1.3.0, if an attacker can get a...

CVE-2026-34065: Unchecked Return Value

nimiq-primitives contains primitives e.g., block, account, transaction to be used in Nimiq's Rust implementation. Prior to version 1.3.0, an untrusted p2p peer can cause a node to panic by announcing an election macro block whose validators set contains an invalid compressed BLS voting key. Hashi...

CVE-2026-34068: Improper Verification of Cryptographic Signature

nimiq-transaction provides the transaction primitive to be used in Nimiq's Rust implementation. Prior to version 1.3.0, the staking contract accepts UpdateValidator transactions that set newvotingkey=Some... while omitting newproofofknowledge. this skips the proof-of-knowledge requirement that is...

GO-2025-4211 Babylon Nil BlockHash in BLS vote extensions triggers panics in consensus handlers in github.com/babylonlabs-io/babylon

Babylon Nil BlockHash in BLS vote extensions triggers panics in consensus handlers in github.com/babylonlabs-io/babylon...

EUVD-2025-201819

Babylon Nil BlockHash in BLS vote extensions triggers panics in consensus handlers...

GHSA-M6WQ-66P2-C8PC Babylon Nil BlockHash in BLS vote extensions triggers panics in consensus handlers

Summary A vulnerability exists in Babylon’s BLS vote extension processing where a malicious active validator can submit a VoteExtension with the blockhash field omitted from the protobuf serialization. Because protobuf fields are optional, unmarshalling succeeds but leaves BlockHash as nil. Babyl...

EUVD-2021-0938

Malware in sbrugna...

Malicious code in bls-slack-service (npm)

The package bls-slack-service was found to contain malicious code...

MAL-2025-15873 Malicious code in bls-slack-service (npm)

The package bls-slack-service was found to contain malicious code...

CVE-2023-36198

Buffer Overflow vulnerability in skalenetwork sgxwallet v.1.9.0 allows an attacker to cause a denial of service via the trustedBlsSignMessage function...

CVE-2021-21405

Lotus is an Implementation of the Filecoin protocol written in Go. BLS signature validation in lotus uses blst library method VerifyCompressed. This method accepts signatures in 2 forms: "serialized", and "compressed", meaning that BLS signatures can be provided as either of 2 unique byte arrays...

GO-2022-0905 BLS Signature "Malleability" in github.com/filecoin-project/lotus

BLS Signature "Malleability" in github.com/filecoin-project/lotus...

Fedora: Security Advisory for rust-blsctl (FEDORA-2024-40ee18b2e7)

The remote host is missing an update for the SPDX-FileCopyrightText: 2024 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...