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...

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...

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...

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

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...