CVE-2026-71891

A flaw was found in Bouncy Castle. When validating Boneh-Lynn-Shacham BLS signature public keys, the library does not verify that a key is constructed on the canonical elliptic curve. An attacker can exploit this issue by supplying a specially crafted public key defined on an alternate curve. Thi...

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: 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-2026-33471: 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...

EUVD-2021-0938

Malware in sbrugna...

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...

BLS Signature "Malleability"

Impact 1. 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. 2. Lotus block validation functions perform a uniquenes...

GHSA-4G52-PQCJ-PHVH BLS Signature "Malleability"

Impact 1. 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. 2. Lotus block validation functions perform a uniquenes...

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...

Design/Logic Flaw

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...

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...

CVE-2021-21405

CVE-2021-21405 concerns Lotus, a Go implementation of the Filecoin protocol. The issue arises from BLS signature validation that uses the blst VerifyCompressed method, which accepts signatures in two forms: “serialized” and “compressed.” Because the block header CID embeds the BlockSig, Lotus pre...

CVE-2021-21405 BLS Signature "Malleability"

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...

CVE-2021-21405: Improper Verification of Cryptographic Signature

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...