CVE-2026-100693
Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass
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.
- Record
CVE-2026-100693- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-178
- Updated
- 2026-11-02
EUVDEUVD-2026-87666
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.
- Record
EUVD-2026-87666- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-xpjr-56xg-vx6v
Hugo versions from v0.162.0 before v0.166.0 contain a case-sensitive validation flaw in the...
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.
- Record
GHSA-xpjr-56xg-vx6v- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-178
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-100693- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-178
- Updated
- 2026-11-02
OSV
Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass
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.
- Record
CVE-2026-100693- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-178
- Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2026-100693- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVRHSA-2026:66266
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- Record
RHSA-2026:66266- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2026-100693- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
hugoDebian:14 |
before 0.166.0-1, plus listed versions 0.131.0-10.131.0-20.150.0-10.150.1-10.151.0-1 Show 41 moreShow less0.151.1-10.151.2-10.152.1-10.152.2-10.153.0-10.153.1-10.153.1-20.153.1-30.153.2-10.154.1-10.154.2-10.154.2-20.154.3-10.154.5-10.155.1-10.155.2-10.155.3-10.157.0-10.157.0-20.157.0-30.158.0-10.158.0-20.158.0-30.159.0-10.159.1-10.159.2-10.160.0-10.160.0-20.160.1-10.161.0-10.161.1-10.162.1-10.162.1-20.162.1-30.162.1-40.162.1-50.162.1-60.162.1-70.165.0-10.165.0-20.165.0-3 |
0.166.0-1 |
hugoRed Hat:hummingbird:1 From an advisory covering 9 CVEs |
before 0:0.166.0-0.1.hum1 | 0:0.166.0-0.1.hum1 |
hugoUbuntu:16.04:LTS |
All versions, plus listed versions 0.15+git20160109.147.dd1d655-10.15+git20160109.147.dd1d655-20.15+git20160128.179.5def6d9-10.15+git20160206.203.ed23711-1 |
None known |
hugoUbuntu:18.04:LTS |
All versions, plus listed versions 0.25.1-20.26-10.35-10.37.1-10.38-10.39-10.40-10.40.1-1 |
None known |
hugoUbuntu:20.04:LTS |
All versions, plus listed versions 0.57.2-10.58.3-10.59.1-1.10.68.3-1 |
None known |
hugoUbuntu:22.04:LTS |
All versions, plus listed versions 0.80.0-60.89.4-20.90.0-10.90.1-10.91.0-1 Show 5 moreShow less0.91.2-10.92.0-10.92.1-1build10.92.2-10.92.2-1ubuntu0.1 |
None known |
hugoUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 0.113.0-30.119.0-20.120.3-10.120.4-10.121.2-1 Show 8 moreShow less0.122.0-10.123.7-1build10.123.7-1ubuntu0.10.123.7-1ubuntu0.20.123.7-1ubuntu0.2+esm10.123.7-1ubuntu0.30.123.7-1ubuntu0.3+esm10.123.7-1ubuntu0.3+esm2 |
None known |
hugoUbuntu:26.10 |
All versions, plus listed versions 0.154.5-10.162.1-50.162.1-7 |
None known |
hugoUbuntu:26.04:LTS |
All versions, plus listed versions 0.131.0-10.152.2-10.153.1-30.153.2-10.154.2-20.154.3-10.154.5-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-100693 is a high vulnerability (CVSS 8.6) in Gohugo Hugo, published September 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.14%, the 3rd percentile. Fixed in hugo 0.166.0-1.
References
github.com/gohugoio/hugo/security/advisories/GHSA-pmrv-x7gp-2rjw
vulncheck.com/advisories/hugo-0.162.0-before-0.166.0-ip-literal-deny-rule-bypass
nvd.nist.gov/vuln/detail/CVE-2026-100693
security-tracker.debian.org/tracker/CVE-2026-100693
Show 60 moreShow less
access.redhat.com/errata/RHSA-2026:66266
images.redhat.com
security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_66266.json
bugzilla.redhat.com/show_bug.cgi?id=2521803
cve.org/CVERecord?id=CVE-2026-10582
go.dev/cl/761180
pkg.go.dev/vuln/GO-2026-4962
ubuntu.com/security/CVE-2026-100693