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CVE-2026-63430 (GCVE-0-2026-63430)

Vulnerability from nvd – Published: 2026-10-15 18:10 – Updated: 2026-10-15 20:25

Title

ammonia: mXSS in ammonia via MathML `annotation-xml` encoding strip

Summary

ammonia is a Rust library for repairing and securing untrusted HTML. Prior to 3.3.2, 4.0.2, and 4.1.3, applications that explicitly allow the math tag, annotation-xml, and at least one raw-text HTML element while disallowing the encoding attribute can permit mutation cross-site scripting. ammonia does not correctly implement annotation-xml's encoding-dependent MathML integration-point behavior after attribute filtering removes encoding, so the sanitizer validates a descendant under one namespace interpretation while the browser reparses the output under another. An attacker can use that namespace transition and an allowed raw-text HTML element to execute JavaScript when a user renders the sanitized output. The required tags are not enabled by default, so applications that do not explicitly allow them are not affected. This issue is fixed in versions 3.3.2, 4.0.2, and 4.1.3.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-15 20:24 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7765 records in the last 180 days details

References

12 references

URL	Tags
https://github.com/rust-ammonia/ammonia/security/…	x_refsource_CONFIRM
https://github.com/rust-ammonia/ammonia/pull/243	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/244	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/245	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/00…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/7a…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/b5…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://ivan09999.github.io/ammonia-mxss	x_refsource_MISC
https://rustsec.org/advisories/RUSTSEC-2026-0193.html	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rust-ammonia	ammonia	Affected: < 3.3.2 Affected: >= 4.0.0, < 4.0.2 Affected: >= 4.1.0, < 4.1.3

Show details on NVD website

JSON

To clipboard

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CVE-2026-102342 (GCVE-0-2026-102342)

Vulnerability from nvd – Published: 2026-10-13 14:28 – Updated: 2026-10-13 20:23

Title

ammonia allows stored XSS through unsanitized SVG animate and set attributes

Summary

ammonia is a Rust library for repairing and securing untrusted HTML. Prior to 3.3.3, 4.0.3, and 4.1.4, applications that allow the SVG animate or set elements can retain an animation whose attributeName targets href and whose value uses the javascript scheme. The sanitized SVG can therefore create a script-bearing link, and a user who clicks the link can execute attacker-controlled script in the application's origin, enabling stored cross-site scripting. This issue is fixed in versions 3.3.3, 4.0.3, and 4.1.4.

Severity

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-13 20:13 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7765 records in the last 180 days details

References

10 references

URL	Tags
https://github.com/rust-ammonia/ammonia/security/…	x_refsource_CONFIRM
https://github.com/rust-ammonia/ammonia/pull/250	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/251	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/252	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/93…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/9e…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/d2…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rust-ammonia	ammonia	Affected: < 3.3.3 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.1.2, < 4.1.4

Show details on NVD website

JSON

To clipboard

{
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                "id": "CVE-2026-102342",
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CVE-2026-63430 (GCVE-0-2026-63430)

Vulnerability from cvelistv5 – Published: 2026-10-15 18:10 – Updated: 2026-10-15 20:25

Title

ammonia: mXSS in ammonia via MathML `annotation-xml` encoding strip

Summary

ammonia is a Rust library for repairing and securing untrusted HTML. Prior to 3.3.2, 4.0.2, and 4.1.3, applications that explicitly allow the math tag, annotation-xml, and at least one raw-text HTML element while disallowing the encoding attribute can permit mutation cross-site scripting. ammonia does not correctly implement annotation-xml's encoding-dependent MathML integration-point behavior after attribute filtering removes encoding, so the sanitizer validates a descendant under one namespace interpretation while the browser reparses the output under another. An attacker can use that namespace transition and an allowed raw-text HTML element to execute JavaScript when a user renders the sanitized output. The required tags are not enabled by default, so applications that do not explicitly allow them are not affected. This issue is fixed in versions 3.3.2, 4.0.2, and 4.1.3.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-15 20:24 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7765 records in the last 180 days details

References

12 references

URL	Tags
https://github.com/rust-ammonia/ammonia/security/…	x_refsource_CONFIRM
https://github.com/rust-ammonia/ammonia/pull/243	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/244	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/245	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/00…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/7a…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/b5…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://ivan09999.github.io/ammonia-mxss	x_refsource_MISC
https://rustsec.org/advisories/RUSTSEC-2026-0193.html	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rust-ammonia	ammonia	Affected: < 3.3.2 Affected: >= 4.0.0, < 4.0.2 Affected: >= 4.1.0, < 4.1.3

Show details on NVD website

JSON

To clipboard

{
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            "tags": [
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            ],
            "url": "https://github.com/rust-ammonia/ammonia/security/advisories/GHSA-9jh8-v38h-cvhr"
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        ],
        "title": "CISA ADP Vulnrichment"
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    ],
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            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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          "tags": [
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          "url": "https://github.com/rust-ammonia/ammonia/commit/7ac3fd3145236f28857eeecbadb544c8659cba31"
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          "name": "https://github.com/rust-ammonia/ammonia/commit/b51bf4f9749ed3cd518330105f20a2c39c9ee274",
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          "url": "https://github.com/rust-ammonia/ammonia/releases/tag/v4.1.3"
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          "name": "https://ivan09999.github.io/ammonia-mxss",
          "tags": [
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          "url": "https://ivan09999.github.io/ammonia-mxss"
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        {
          "name": "https://rustsec.org/advisories/RUSTSEC-2026-0193.html",
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        "discovery": "UNKNOWN"
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      "title": "ammonia: mXSS in ammonia via MathML `annotation-xml` encoding strip"
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-63430",
    "datePublished": "2026-10-15T18:10:35.869Z",
    "dateReserved": "2026-07-16T19:35:57.766Z",
    "dateUpdated": "2026-10-15T20:25:49.464Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-102342 (GCVE-0-2026-102342)

Vulnerability from cvelistv5 – Published: 2026-10-13 14:28 – Updated: 2026-10-13 20:23

Title

ammonia allows stored XSS through unsanitized SVG animate and set attributes

Summary

ammonia is a Rust library for repairing and securing untrusted HTML. Prior to 3.3.3, 4.0.3, and 4.1.4, applications that allow the SVG animate or set elements can retain an animation whose attributeName targets href and whose value uses the javascript scheme. The sanitized SVG can therefore create a script-bearing link, and a user who clicks the link can execute attacker-controlled script in the application's origin, enabling stored cross-site scripting. This issue is fixed in versions 3.3.3, 4.0.3, and 4.1.4.

Severity

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-13 20:13 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7765 records in the last 180 days details

References

10 references

URL	Tags
https://github.com/rust-ammonia/ammonia/security/…	x_refsource_CONFIRM
https://github.com/rust-ammonia/ammonia/pull/250	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/251	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/pull/252	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/93…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/9e…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/commit/d2…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC
https://github.com/rust-ammonia/ammonia/releases/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rust-ammonia	ammonia	Affected: < 3.3.3 Affected: >= 4.0.0, < 4.0.3 Affected: >= 4.1.2, < 4.1.4

Show details on NVD website

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To clipboard

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              "content": {
                "id": "CVE-2026-102342",
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-10-13T20:13:15.972756Z",
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}

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4 vulnerabilities by rust-ammonia

CVE-2026-63430 (GCVE-0-2026-63430)

CVE-2026-102342 (GCVE-0-2026-102342)

CVE-2026-63430 (GCVE-0-2026-63430)

CVE-2026-102342 (GCVE-0-2026-102342)