CVE-2026-30246: Fiber is a web framework for Go

Q: How do I fix CVE-2026-30246?

fiber: upgrade to newer than 3.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-30246 being exploited?

CVE-2026-30246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-30246 affect?

CVE-2026-30246 affects fiber. Severity is medium (CVSS 6.5). Fiber is a web framework for Go. In github.com/gofiber/fiber/v3 versions through 3.1.0, the default key generator in the cache middleware uses only the request path and does not include the query string. As a result, requests for the same p

Q: How urgent is CVE-2026-30246?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 6.5REMOTEUPGRADE

CVE-2026-30246 is a medium-severity flaw (CVSS 6.5) affecting fiber. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Fiber is a web framework for Go. In github.com/gofiber/fiber/v3 versions through 3.1.0, the default key generator in the cache middleware uses only the request path and does not include the query string. As a result, requests for the same path with different query parameters can share a cache key and receive the wrong cached response. This can cause response mix-up for query-dependent endpoints and may expose data intended for a different request

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 84%)
CISA exploited list	No
Weakness	CWE-436
Published	2026-05-05
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: gofiber

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-05 13:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

gofiber fiber UPGRADE

Affected: <= 3.1.0

Fixed in: newer than 3.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fiber || rpm -q fiber || fiber --version

2. UPGRADE to newer than 3.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fiber

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fiber

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-30246?

fiber: upgrade to newer than 3.1.0. Exact commands for each OS are on this page.

Is CVE-2026-30246 being exploited?

CVE-2026-30246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-30246 affect?

CVE-2026-30246 affects fiber. Severity is medium (CVSS 6.5). Fiber is a web framework for Go. In github.com/gofiber/fiber/v3 versions through 3.1.0, the default key generator in the cache middleware uses only the request path and does not include the query string. As a result, requests for the same p

How urgent is CVE-2026-30246?

Priority 37/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2026-42554 MEDIUM 6.1 UPGRADE Fiber is a web framework for Go
CVE-2026-44332 MEDIUM 5.3 UPGRADE Fiber is an Express inspired web framework written in Go
CVE-2026-45045 MEDIUM 5.3 UPGRADE Fiber is an Express inspired web framework written in Go
CVE-2026-53624 MEDIUM 4.8 UPGRADE Fiber is an Express inspired web framework written in Go

References

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