CVE-2026-34950 fast-jwt has an incomplete fix for CVE-2023-48223: JWT Algorithm Confusion via Whitespace-Prefixed RSA Public Key

fast-jwt provides fast JSON Web Token JWT implementation. In 6.1.0 and earlier, the publicKeyPemMatcher regex in fast-jwt/src/crypto.js uses a ^ anchor that is defeated by any leading whitespace in the key string, re-enabling the exact same JWT algorithm confusion attack that CVE-2023-48223 patch...

fast-jwt 安全漏洞

fast-jwt is a JSON Web Token implementation open-sourced by Nearform. Versions of fast-jwt prior to 6.1.0 contained security vulnerabilities. These vulnerabilities stemmed from the incorrect creation of unique keys using the custom cacheKeyBuilder method, which could lead to cache conflicts and...

fast-jwt 安全漏洞

fast-jwt is a JSON Web Token implementation open-sourced by Nearform. Versions of fast-jwt up to 6.1.0 contained security vulnerabilities, which stemmed from the lack of verification of the crit header parameter. This allowed tokens containing unknown extensions to be accepted...

fast-jwt 加密问题漏洞

fast-jwt is a JSON Web Token implementation open-sourced by Nearform. Versions of fast-jwt up to 6.1.0 contained a vulnerability related to encryption. This vulnerability stemmed from the ^ anchor character in the publicKeyPemMatcher regular expression, which could be bypassed by leading spaces i...

GHSA-HM7R-C7QW-GHP6 fast-jwt accepts unknown `crit` header extensions (RFC 7515 violation)

Summary fast-jwt does not validate the crit Critical Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that fast-jwt does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. ---...

CVE-2026-5327

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

Improper Validation of Unsafe Equivalence in Input

Overview fast-jwt is a Fast JSON Web Token implementation Affected versions of this package are vulnerable to Improper Validation of Unsafe Equivalence in Input in the cacheKeyBuilder function when custom implementations do not generate unique keys for different tokens, leading to cache collision...

ML Defender (ARGus NDR): An Open-Source Embedded ML NIDS for Botnet and Anomalous Traffic Detection in Resource-Constrained Organizations

Ransomware and DDoS attacks disproportionately impact hospitals, schools, and small organizations that cannot afford enterprise security solutions. We present ML Defender aRGus NDR, an open-source network intrusion detection system built in C++20, deployable on commodity hardware at approximately...

GHSA-MVF2-F6GM-W987 fast-jwt: Incomplete fix for CVE-2023-48223: JWT Algorithm Confusion via Whitespace-Prefixed RSA Public Key

Summary The fix for GHSA-c2ff-88x2-x9pg CVE-2023-48223 is incomplete. The publicKeyPemMatcher regex in fast-jwt/src/crypto.js uses a ^ anchor that is defeated by any leading whitespace in the key string, re-enabling the exact same JWT algorithm confusion attack that the CVE patched. Details The f...

fast-jwt: Incomplete fix for CVE-2023-48223: JWT Algorithm Confusion via Whitespace-Prefixed RSA Public Key

Summary The fix for GHSA-c2ff-88x2-x9pg CVE-2023-48223 is incomplete. The publicKeyPemMatcher regex in fast-jwt/src/crypto.js uses a ^ anchor that is defeated by any leading whitespace in the key string, re-enabling the exact same JWT algorithm confusion attack that the CVE patched. Details The f...

GHSA-5226-3RVG-HP4X fast-filesystem-mcp is vulnerable to command injection through handleGetDiskUsage function

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

fast-filesystem-mcp is vulnerable to command injection through handleGetDiskUsage function

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Overview fast-filesystem-mcp is a Fast Filesystem MCP Server - Advanced file operations with Auto-Chunking, Sequential Reading, complex file operations copy, move, delete, batch, compress, optimized for Claude Desktop Affected versions of this package are vulnerable to Improper Neutralization of...

EUVD-2026-18202

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

CVE-2026-5327

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

CVE-2026-5327 efforthye fast-filesystem-mcp index.ts handleGetDiskUsage command injection

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

CVE-2026-5327

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

CVE-2026-5327 efforthye fast-filesystem-mcp index.ts handleGetDiskUsage command injection

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...

Inside the Talos 2025 Year in Review: A discussion on what the data means for defenders

Every year, the Cisco Talos Year in Review captures the patterns shaping the threat landscape. The 2025 report paints a clear picture: Attackers are moving faster than ever, while using identity-related attacks as the primary battleground. To unpack the biggest takeaways and what they mean for...

PT-2026-29725

A security flaw has been discovered in efforthye fast-filesystem-mcp up to 3.5.1. The affected element is the function handleGetDiskUsage of the file src/index.ts. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been...