CVE-2026-53624

Q: How do I fix CVE-2026-53624?

Upgrade fiber to 3.4.0 or later.

Q: Is CVE-2026-53624 being actively exploited?

Not that we know of. CVE-2026-53624 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.21% is the estimated probability that it will be exploited in the next 30 days. That is higher than 11% of all scored CVEs.

Q: How severe is CVE-2026-53624?

CVE-2026-53624 has a CVSS v3 base score of 4.8, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-53624 affect?

Published advisories record a fix for fiber (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

4.8

CVSS v3

NVD

Description

Fiber is an Express inspired web framework written in Go. Prior to 3.4.0, the helmet middleware in middleware/helmet/helmet.go never sets the Strict-Transport-Security response header even when HSTSMaxAge is configured because it checks c.Protocol() for https instead of c.Scheme(). This issue is fixed in version 3.4.0.

CWE-319

How to fix

Remediation Available

fiberNVD

Affected:< 3.4.0Fixed in:3.4.0CVE-2026-53624derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploit Intelligence

0.21%probability of exploitation in 30 days

11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Patch2

Exploit1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-319 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-12710	High	8.0	77%	-	-
CVE-2024-25735	Critical	9.1	51%	-	Fix
CVE-2019-3993	High	7.5	46%	-	-
CVE-2017-5259	High	8.8	31%	-	-
CVE-2016-5649	Critical	9.8	24%	-	-
CVE-2021-39341	High	8.2	22%	-	-

Common questions

How do I fix CVE-2026-53624?

Upgrade fiber to 3.4.0 or later.

Is CVE-2026-53624 being actively exploited?

Not that we know of. CVE-2026-53624 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.21% is the estimated probability that it will be exploited in the next 30 days. That is higher than 11% of all scored CVEs.

How severe is CVE-2026-53624?

CVE-2026-53624 has a CVSS v3 base score of 4.8, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-53624 affect?

Published advisories record a fix for fiber (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-53624

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-15.