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CVE-2026-55407

CVE

Threat entity extracted from intelligence sources

Frequency
3
occurrences
First Seen
June 30, 2026
Last Seen
July 1, 2026
API
Exploited in Wild
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Ransomware Use
—
Public Exploits
—
Attack Vector
—

Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Zero-Day DoS Vulnerability Found in Anthropic's buffa Library57.8

A zero-day memory amplification denial-of-service (DoS) vulnerability has been discovered in Anthropic's Rust-based protobuf library, buffa. Identified as CVE-2026-55407, the flaw allows attackers to exploit unbounded-allocation data flows, leading to significant memory depletion with small inputs....

Public Exploits

Checking GitHub for proof-of-concept code…

CVE Details

Related Entities

DDoSDenial of ServiceAnthropicCwe-400 - Uncontrolled Resource ConsumptionT1499 - Endpoint Denial of ServiceBuffaConnectrpcGRPCProstProtobufRust