CVE-2026-25899

Fiber is an Express inspired web framework written in Go. In versions on the v3 branch prior to 3.1.0, the use of the fiberflash cookie can force an unbounded allocation on any server. A crafted 10-character cookie value triggers an attempt to allocate up to 85GB of memory via unvalidated msgpack...

CVE-2026-25899 Fiber is Vulnerable to Denial of Service via Flash Cookie Unbounded Allocation

Fiber is an Express inspired web framework written in Go. In versions on the v3 branch prior to 3.1.0, the use of the fiberflash cookie can force an unbounded allocation on any server. A crafted 10-character cookie value triggers an attempt to allocate up to 85GB of memory via unvalidated msgpack...

CVE-2026-25899 Fiber is Vulnerable to Denial of Service via Flash Cookie Unbounded Allocation

Fiber is an Express inspired web framework written in Go. In versions on the v3 branch prior to 3.1.0, the use of the fiberflash cookie can force an unbounded allocation on any server. A crafted 10-character cookie value triggers an attempt to allocate up to 85GB of memory via unvalidated msgpack...

CVE-2026-25899 Fiber is Vulnerable to Denial of Service via Flash Cookie Unbounded Allocation

Fiber is an Express inspired web framework written in Go. In versions on the v3 branch prior to 3.1.0, the use of the fiberflash cookie can force an unbounded allocation on any server. A crafted 10-character cookie value triggers an attempt to allocate up to 85GB of memory via unvalidated msgpack...

CVE-2026-25899

CVE-2026-25899 affects GoFiber (Fiber) v3 branch prior to 3.1.0. The issue arises from the use of the fiber_flash cookie, which can trigger unbounded memory allocation (up to ~85 GB) via unvalidated MsgPack deserialization. A crafted 10-character cookie causes the allocation, with no authenticati...

CVE-2026-25891 Fiber has an Arbitrary File Read in Static Middleware on Windows

Fiber is an Express inspired web framework written in Go. A Path Traversal CWE-22 vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been...

CVE-2026-25891

This CVE affects the Go web framework Fiber (v3 up to 3.0.0) and allows a remote attacker to perform a path traversal to bypass the static middleware sanitizer and read arbitrary files on Windows. Root cause: improper validation in static middleware enabling directory traversal (CWE-22). Impact: ...

CVE-2026-25891

Fiber is an Express inspired web framework written in Go. A Path Traversal CWE-22 vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been...

CVE-2026-25891 Fiber has an Arbitrary File Read in Static Middleware on Windows

Fiber is an Express inspired web framework written in Go. A Path Traversal CWE-22 vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been...

CVE-2026-25891 Fiber has an Arbitrary File Read in Static Middleware on Windows

Fiber is an Express inspired web framework written in Go. A Path Traversal CWE-22 vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been...

CVE-2026-25882 Fiber has a Denial of Service Vulnerability via Route Parameter Overflow

Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route...

CVE-2026-25882 Fiber has a Denial of Service Vulnerability via Route Parameter Overflow

Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route...

CVE-2026-25882

Fiber (Go) has a Denial of Service vulnerability (CVE-2026-25882) affecting v2 and v3: routing mismatch with more than 30 parameters can crash the app due to missing validation during route registration and an unbounded array write during request matching. Affected versions are v2 prior to 2.52.1...

CVE-2026-25882 Fiber has a Denial of Service Vulnerability via Route Parameter Overflow

Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route...

CVE-2026-25882

Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route...

GHSA-MRQ8-RJMW-WPQ3 Fiber has a Denial of Service Vulnerability via Route Parameter Overflow

A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route registration combined with an unbounded array write during...

Fiber has a Denial of Service Vulnerability via Route Parameter Overflow

A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route registration combined with an unbounded array write during...

Memory Allocation with Excessive Size Value

Overview github.com/gofiber/fiber/v3 is an Express inspired web framework written in Go. Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value via the parseAndClearFlashMessages function. An attacker can cause excessive memory allocation by sending a...

GHSA-2MR3-M5Q5-WGP6 Fiber is Vulnerable to Denial of Service via Flash Cookie Unbounded Allocation

Summary The use of the fiberflash cookie can force an unbounded allocation on any server. A crafted 10-character cookie value triggers an attempt to allocate up to 85GB of memory via unvalidated msgpack deserialization. No authentication is required. Every GoFiber v3 endpoint is affected regardle...

Fiber has an Arbitrary File Read in Static Middleware on Windows

Summary Description A Path Traversal CWE-22 vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been patched in Fiber v3 version 3.1.0. Detail...