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CVE-2026-25891

Gofiber Fiber path traversal

7.5 HIGHPublic exploitEPSS 0.69%
  1. Published24 Feb 2026

Description

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 patched in Fiber v3 version 3.1.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Gofiber Fiber≥ 3.0.0 < 3.1.0

Remediation

Fixed in
Gofiber Fiber≥ 3.1.0

References

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Frequently asked

Is CVE-2026-25891 being actively exploited?

CVE-2026-25891 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.69%.

How severe is CVE-2026-25891?

CVE-2026-25891 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.69% probability of exploitation.

Which products are affected by CVE-2026-25891?

Affected products include Gofiber Fiber.

How do I fix CVE-2026-25891?

Upgrade affected software to a fixed version, for example Gofiber Fiber 3.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25891 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.