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CVE-2026-100694

Hugo before 0.166.0 Cross-Site Scripting via text/org

5.1 MediumFix available

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Active

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
None

Exploit likelihood

0.19%Unchanged since Sep 27, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.1

Hugo before 0.166.0 Cross-Site Scripting via text/org

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Record
CVE-2026-100694
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2026-87667 5.1

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Record
EUVD-2026-87667
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-98xc-jpvp-56pj 5.1

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped...

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Record
GHSA-98xc-jpvp-56pj
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
NVD 5.1

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Record
CVE-2026-100694
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 5.1

Hugo before 0.166.0 Cross-Site Scripting via text/org

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Record
CVE-2026-100694
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-79
Updated
2026-11-02
OSVDEBIAN-CVE-2026-100694 5.1

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Record
DEBIAN-CVE-2026-100694
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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 7.4

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:66266
CVSS 3.1
7.4 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-100694 5.1

Hugo is a static site generator. In versions from v0.56.0 through v0.165.x, content files mapped to the text/org media type are rendered without escaping raw HTML: Org export blocks and @@html:...@@ snippets pass HTML through unescaped, resulting in cross-site scripting (XSS) in the generated site. An attacker who can supply or influence a content file under /content or the output of a content adapter can inject scripts that execute in the browsers of visitors to the affected pages. Only pages whose source file or content-adapter output declares the text/org media type are affected, and sites that fully trust all content sources are not impacted. Version v0.166.0 fixes the issue by introducing a security.allowContent allowlist that denies text/org by default; sites that intentionally author Org Mode content can opt back in with [security] allowContent = ['.*'].

Record
UBUNTU-CVE-2026-100694
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
hugo
Debian:12
All versions, plus listed versions
0.111.3-10.112.7-10.113.0-10.113.0-20.113.0-3
Show 45 moreShow less
0.114.1-10.114.1-20.115.4-10.116.1-10.117.0-10.118.2-10.119.0-10.119.0-20.120.3-10.120.4-10.121.1-10.121.2-10.122.0-10.123.3-10.123.7-10.123.8-10.123.8-20.124.1-10.125.4-10.125.5-10.125.6-10.125.7-10.126.1-10.126.2-10.126.3-10.127.0-10.128.2-10.128.2-20.129.0-10.129.0-20.130.0-10.130.0-20.131.0-10.131.0-20.150.0-10.150.1-10.151.0-10.151.1-10.151.2-10.152.1-10.152.2-10.153.0-10.153.1-10.153.1-20.153.1-3
None known
hugo
Debian:13
All versions, plus listed versions
0.131.0-10.131.0-20.150.0-10.150.1-10.151.0-1
Show 45 moreShow less
0.151.1-10.151.2-10.152.1-10.152.2-10.153.0-10.153.1-10.153.1-20.153.1-30.153.2-10.154.1-10.154.2-10.154.2-20.154.3-10.154.5-10.155.1-10.155.2-10.155.3-10.157.0-10.157.0-20.157.0-30.158.0-10.158.0-20.158.0-30.159.0-10.159.1-10.159.2-10.160.0-10.160.0-20.160.1-10.161.0-10.161.1-10.162.1-10.162.1-20.162.1-30.162.1-40.162.1-50.162.1-60.162.1-70.165.0-10.165.0-20.165.0-30.166.0-10.166.0-20.167.0-10.167.0-2
None known
hugo
Debian: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 less
0.151.1-10.151.2-10.152.1-10.152.2-10.153.0-10.153.1-10.153.1-20.153.1-30.153.2-10.154.1-10.154.2-10.154.2-20.154.3-10.154.5-10.155.1-10.155.2-10.155.3-10.157.0-10.157.0-20.157.0-30.158.0-10.158.0-20.158.0-30.159.0-10.159.1-10.159.2-10.160.0-10.160.0-20.160.1-10.161.0-10.161.1-10.162.1-10.162.1-20.162.1-30.162.1-40.162.1-50.162.1-60.162.1-70.165.0-10.165.0-20.165.0-3
0.166.0-1
hugo
Red Hat:hummingbird:1
From an advisory covering 9 CVEs
before 0:0.166.0-0.1.hum1
0:0.166.0-0.1.hum1
hugo
Ubuntu: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
hugo
Ubuntu: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
hugo
Ubuntu:20.04:LTS
All versions, plus listed versions
0.57.2-10.58.3-10.59.1-1.10.68.3-1
None known
hugo
Ubuntu: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 less
0.91.2-10.92.0-10.92.1-1build10.92.2-10.92.2-1ubuntu0.1
None known
hugo
Ubuntu: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 less
0.122.0-10.123.7-1build10.123.7-1ubuntu0.10.123.7-1ubuntu0.20.123.7-1ubuntu0.2+esm10.123.7-1ubuntu0.30.123.7-1ubuntu0.3+esm10.123.7-1ubuntu0.3+esm2
None known
hugo
Ubuntu:26.10
All versions, plus listed versions
0.154.5-10.162.1-50.162.1-7
None known
hugo
Ubuntu: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

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-100694 is a medium vulnerability (CVSS 5.1) 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 0.19%, the 8th percentile. Fixed in hugo 0.166.0-1.

References

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This page doesn't list everything

Left out here: 47 versions. The JSON record has them.

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