How severe is CVE-2026-100693?

CVE-2026-100693 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-100693 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-100693?

CVE-2026-100693 affects Gohugo Hugo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-100693?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-100693 published?

CVE-2026-100693 was published on 2026-09-26 and last updated on 2026-09-30.

CVE-2026-100693

CVE-2026-100693 is a high-severity vulnerability in Gohugo Hugo with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-178.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v4: 8.6
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-178
Affected product: Gohugo Hugo
Published: 2026-09-26
Last modified: 2026-09-30

Description

Hugo versions from v0.162.0 before v0.166.0 contain a case-sensitive validation flaw in the security.http.urls IP-literal deny rule that allows attackers to bypass restrictions. Attackers can use mixed-case URL schemes in resources.GetRemote calls to fetch from restricted IP addresses like localhost.

Frequently asked questions

What is CVE-2026-100693?: Hugo versions from v0.162.0 before v0.166.0 contain a case-sensitive validation flaw in the security.http.urls IP-literal deny rule that allows attackers to bypass restrictions. Attackers can use mixed-case URL schemes in resources.GetRemote calls to fetch from restricted IP addresses like localhost.
How severe is CVE-2026-100693?: CVE-2026-100693 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-100693 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-100693?: CVE-2026-100693 affects Gohugo Hugo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-100693?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-100693 published?: CVE-2026-100693 was published on 2026-09-26 and last updated on 2026-09-30.

References

Affected products (1)

cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*

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