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12 vulnerabilities by flavorjones
CVE-2026-73492 (GCVE-0-2026-73492)
Vulnerability from nvd – Published: 2026-08-12 21:00 – Updated: 2026-08-14 22:18
VLAI
EPSS
VEX
Title
Loofah `allowed_uri?` does not detect `javascript:` URIs split by numeric character references without semicolons
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: or vbscript: URIs whose scheme is split by semicolon-less numeric character references such as :, 	, 
, or 
. CGI.unescapeHTML leaves these references encoded, so allowed_uri? reports the URL safe even though a browser decodes an encoded colon or strips encoded whitespace and executes the resulting URI scheme. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not affected. This issue is fixed in version 2.25.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 22:17 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/pull/308 | x_refsource_MISC |
| https://github.com/flavorjones/loofah/commit/f1be… | x_refsource_MISC |
| https://github.com/flavorjones/loofah/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.25.0, < 2.25.2
|
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CVE-2026-73491 (GCVE-0-2026-73491)
Vulnerability from nvd – Published: 2026-08-12 20:59 – Updated: 2026-08-13 13:49
VLAI
EPSS
VEX
Title
Loofah `allowed_uri?` does not detect `javascript:` URIs split by named whitespace character references
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character references 	 or 
. CGI.unescapeHTML leaves those references intact, so allowed_uri? reports the URL safe even though a browser decodes and strips the tab or line feed and executes the resulting javascript: URL. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not affected. This issue is fixed in version 2.25.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:49 UTC
CWE
- CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/pull/308 | x_refsource_MISC |
| https://github.com/flavorjones/loofah/commit/5e91… | x_refsource_MISC |
| https://github.com/flavorjones/loofah/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.25.0, < 2.25.2
|
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CVE-2026-73490 (GCVE-0-2026-73490)
Vulnerability from nvd – Published: 2026-08-12 20:58 – Updated: 2026-08-13 13:01
VLAI
EPSS
VEX
Title
Loofah: SVG `href` attribute bypasses local-reference restriction
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:01 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/pull/308 | x_refsource_MISC |
| https://github.com/flavorjones/loofah/commit/2086… | x_refsource_MISC |
| https://github.com/flavorjones/loofah/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
< 2.25.2
|
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CVE-2022-23516 (GCVE-0-2022-23516)
Vulnerability from nvd – Published: 2022-12-14 13:26 – Updated: 2025-11-03 21:45
VLAI
EPSS
VEX
Title
Uncontrolled Recursion in Loofah
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.2.0, < 2.19.1 uses recursion for sanitizing CDATA sections, making it susceptible to stack exhaustion and raising a SystemStackError exception. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1. Users who are unable to upgrade may be able to mitigate this vulnerability by limiting the length of the strings that are sanitized.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-18 18:19 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.2.0, < 2.19.1
|
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CVE-2022-23515 (GCVE-0-2022-23515)
Vulnerability from nvd – Published: 2022-12-14 13:23 – Updated: 2025-11-03 21:45
VLAI
EPSS
VEX
Title
Improper neutralization of data URIs may allow XSS in Loofah
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.1.0, < 2.19.1 is vulnerable to cross-site scripting via the image/svg+xml media type in data URIs. This issue is patched in version 2.19.1.
Severity
6.1 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/issues/101 | x_refsource_MISC |
| https://hackerone.com/reports/1694173 | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2023… | |
| https://lists.debian.org/debian-lts-announce/2024… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.1.0, < 2.19.1
|
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CVE-2022-23514 (GCVE-0-2022-23514)
Vulnerability from nvd – Published: 2022-12-14 13:19 – Updated: 2025-11-03 21:45
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in Loofah
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah < 2.19.1 contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-21 14:49 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://hackerone.com/reports/1684163 | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2023… | |
| https://lists.debian.org/debian-lts-announce/2024… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
< 2.19.1
|
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CVE-2026-73492 (GCVE-0-2026-73492)
Vulnerability from cvelistv5 – Published: 2026-08-12 21:00 – Updated: 2026-08-14 22:18
VLAI
EPSS
VEX
Title
Loofah `allowed_uri?` does not detect `javascript:` URIs split by numeric character references without semicolons
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: or vbscript: URIs whose scheme is split by semicolon-less numeric character references such as :, 	, 
, or 
. CGI.unescapeHTML leaves these references encoded, so allowed_uri? reports the URL safe even though a browser decodes an encoded colon or strips encoded whitespace and executes the resulting URI scheme. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not affected. This issue is fixed in version 2.25.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 22:17 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/pull/308 | x_refsource_MISC |
| https://github.com/flavorjones/loofah/commit/f1be… | x_refsource_MISC |
| https://github.com/flavorjones/loofah/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.25.0, < 2.25.2
|
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CVE-2026-73491 (GCVE-0-2026-73491)
Vulnerability from cvelistv5 – Published: 2026-08-12 20:59 – Updated: 2026-08-13 13:49
VLAI
EPSS
VEX
Title
Loofah `allowed_uri?` does not detect `javascript:` URIs split by named whitespace character references
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: URIs whose scheme is split or prefixed with the HTML5 named whitespace character references 	 or 
. CGI.unescapeHTML leaves those references intact, so allowed_uri? reports the URL safe even though a browser decodes and strips the tab or line feed and executes the resulting javascript: URL. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not affected. This issue is fixed in version 2.25.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:49 UTC
CWE
- CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/pull/308 | x_refsource_MISC |
| https://github.com/flavorjones/loofah/commit/5e91… | x_refsource_MISC |
| https://github.com/flavorjones/loofah/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.25.0, < 2.25.2
|
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CVE-2026-73490 (GCVE-0-2026-73490)
Vulnerability from cvelistv5 – Published: 2026-08-12 20:58 – Updated: 2026-08-13 13:01
VLAI
EPSS
VEX
Title
Loofah: SVG `href` attribute bypasses local-reference restriction
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:01 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/pull/308 | x_refsource_MISC |
| https://github.com/flavorjones/loofah/commit/2086… | x_refsource_MISC |
| https://github.com/flavorjones/loofah/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
< 2.25.2
|
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CVE-2022-23516 (GCVE-0-2022-23516)
Vulnerability from cvelistv5 – Published: 2022-12-14 13:26 – Updated: 2025-11-03 21:45
VLAI
EPSS
VEX
Title
Uncontrolled Recursion in Loofah
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.2.0, < 2.19.1 uses recursion for sanitizing CDATA sections, making it susceptible to stack exhaustion and raising a SystemStackError exception. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1. Users who are unable to upgrade may be able to mitigate this vulnerability by limiting the length of the strings that are sanitized.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-18 18:19 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.2.0, < 2.19.1
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CVE-2022-23515 (GCVE-0-2022-23515)
Vulnerability from cvelistv5 – Published: 2022-12-14 13:23 – Updated: 2025-11-03 21:45
VLAI
EPSS
VEX
Title
Improper neutralization of data URIs may allow XSS in Loofah
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.1.0, < 2.19.1 is vulnerable to cross-site scripting via the image/svg+xml media type in data URIs. This issue is patched in version 2.19.1.
Severity
6.1 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://github.com/flavorjones/loofah/issues/101 | x_refsource_MISC |
| https://hackerone.com/reports/1694173 | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2023… | |
| https://lists.debian.org/debian-lts-announce/2024… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.1.0, < 2.19.1
|
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CVE-2022-23514 (GCVE-0-2022-23514)
Vulnerability from cvelistv5 – Published: 2022-12-14 13:19 – Updated: 2025-11-03 21:45
VLAI
EPSS
VEX
Title
Inefficient Regular Expression Complexity in Loofah
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah < 2.19.1 contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-21 14:49 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/flavorjones/loofah/security/ad… | x_refsource_CONFIRM |
| https://hackerone.com/reports/1684163 | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2023… | |
| https://lists.debian.org/debian-lts-announce/2024… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
< 2.19.1
|
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