CVE-2026-45045

A flaw was found in the GoFiber web framework's BalancerForward proxy helper. This vulnerability allows a remote attacker to spoof their IP address by manipulating the X-Real-IP header. Because the Header.Add function is used instead of Header.Set, an attacker-supplied X-Real-IP value is forwarde...

GO-2026-5886 GoFiber Vulnerable to Username Enumeration via Timing Oracle in BasicAuth Default Authorizer in github.com/gofiber/fiber

GoFiber Vulnerable to Username Enumeration via Timing Oracle in BasicAuth Default Authorizer in github.com/gofiber/fiber...

GO-2026-5912 GoFiber never set HSTS header in helmet middleware due to incorrect protocol check in github.com/gofiber/fiber

GoFiber never set HSTS header in helmet middleware due to incorrect protocol check in github.com/gofiber/fiber...

GO-2026-5887 GoFiber Vulnerable to X-Real-IP Spoofing via Header.Add() in BalancerForward in github.com/gofiber/fiber

GoFiber Vulnerable to X-Real-IP Spoofing via Header.Add in BalancerForward in github.com/gofiber/fiber...

CVE-2026-44332

A flaw was found in the GoFiber web framework. A remote attacker could exploit a vulnerability in the default Authorizer function of the BasicAuth middleware. This flaw, caused by short-circuit evaluation, allows for reliable remote username enumeration through differences in response timing. Thi...

CVE-2026-53624

creationtimestamp| type| source ---|---|--- 2026-07-06 22:35:20+00:00| published-proof-of-concept| https://github.com/gofiber/fiber/security/advisories/GHSA-gv83-gqw6-9j2c...

GoFiber never set HSTS header in helmet middleware due to incorrect protocol check

Summary The helmet middleware in gofiber/fiber never sets the Strict-Transport-Security HSTS response header, even when HSTSMaxAge is explicitly configured, because the condition check at helmet.go:67 uses c.Protocol — which returns the HTTP protocol version string e.g., "HTTP/1.1", "HTTP/2.0" —...

GHSA-GV83-GQW6-9J2C GoFiber never set HSTS header in helmet middleware due to incorrect protocol check

Summary The helmet middleware in gofiber/fiber never sets the Strict-Transport-Security HSTS response header, even when HSTSMaxAge is explicitly configured, because the condition check at helmet.go:67 uses c.Protocol — which returns the HTTP protocol version string e.g., "HTTP/1.1", "HTTP/2.0" —...

Cleartext Transmission of Sensitive Information

Overview Affected versions of this package are vulnerable to Cleartext Transmission of Sensitive Information due to the incorrect protocol check in the helmet middleware, which fails to set the Strict-Transport-Security header even when configured. An attacker can intercept and manipulate network...

PT-2026-56054

Name of the Vulnerable Software and Affected Versions Fiber versions prior to 3.4.0 Description The helmet middleware in the Fiber web framework fails to set the Strict-Transport-Security HSTS response header, even when HSTSMaxAge is configured. This occurs because the logic in...

GoFiber Vulnerable to X-Real-IP Spoofing via Header.Add() in BalancerForward

Summary The BalancerForward proxy helper in GoFiber uses Header.Add instead of Header.Set when injecting the X-Real-IP header. This appends the real client IP as a second header value rather than replacing any attacker-supplied value. Upstream servers that read the first X-Real-IP header nginx,...

GHSA-GCFQ-8GQF-4876 GoFiber Vulnerable to X-Real-IP Spoofing via Header.Add() in BalancerForward

Summary The BalancerForward proxy helper in GoFiber uses Header.Add instead of Header.Set when injecting the X-Real-IP header. This appends the real client IP as a second header value rather than replacing any attacker-supplied value. Upstream servers that read the first X-Real-IP header nginx,...

GHSA-G5VH-55HW-RXM8 GoFiber Vulnerable to Username Enumeration via Timing Oracle in BasicAuth Default Authorizer

Summary The default Authorizer function in GoFiber's BasicAuth middleware uses short-circuit evaluation that skips password hash comparison for non-existent usernames. With bcrypt-hashed passwords the primary use case, the timing difference between a valid and invalid username is approximately...

GoFiber Vulnerable to Username Enumeration via Timing Oracle in BasicAuth Default Authorizer

Summary The default Authorizer function in GoFiber's BasicAuth middleware uses short-circuit evaluation that skips password hash comparison for non-existent usernames. With bcrypt-hashed passwords the primary use case, the timing difference between a valid and invalid username is approximately...

Predictable UUID Generation

github.com/gofiber/utils is vulnerable to predictable UUID generation.The vulnerability is due to fallback to predictable UUID values when crypto/rand.Read fails, which allows an attacker to guess UUIDs and exploit security-critical operations relying on them...

SUSE 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...

GO-2026-4534 Fiber is Vulnerable to Denial of Service via Flash Cookie Unbounded Allocation in github.com/gofiber/fiber/v3

Fiber is Vulnerable to Denial of Service via Flash Cookie Unbounded Allocation in github.com/gofiber/fiber/v3...

GO-2026-4543 Fiber has a Denial of Service Vulnerability via Route Parameter Overflow in github.com/gofiber/fiber

Fiber has a Denial of Service Vulnerability via Route Parameter Overflow in github.com/gofiber/fiber...

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...

Improper Validation of Array Index

Overview github.com/gofiber/fiber/v2 is an Express inspired web framework written in Go. Affected versions of this package are vulnerable to Improper Validation of Array Index via the route registration process. An attacker can cause the application to crash by sending requests to routes containi...