EUVD-2026-98766Published

ammonia allows stored XSS through unsanitized SVG animate and set attributes

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-102342

Published

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.

Source published: 13 Oct 2026 14:28:50 UTC
Source modified: 13 Oct 2026 20:23:10 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

euvd · EUVD-2026-98766

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Oct 13, 2026, 2:28:50 PM

dateUpdated: Oct 13, 2026, 8:23:10 PM

1 related source bulletins · separate from aliases

msrc_CVE-2026-102342: ammonia allows stored XSS through unsanitized SVG animate and set attributes

CVE-2026-102342

Source published: Oct 13, 2026, 2:28:50 PM (timezone not stated)
Source modified: Oct 13, 2026, 8:23:10 PM (timezone not stated)
Observed here: 9 Nov 2026 05:03:23 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

nvd · CVE-2026-102342

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-79

Original publisher date fields

published: 2026-10-13T15:17:30.177

lastModified: 2026-10-16T20:04:29.760

Source published: 13 Oct 2026 15:17:30 UTC
Source modified: 16 Oct 2026 20:04:29 UTC
Observed here: 25 Oct 2026 04:17:26 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

osv · GHSA-m6mh-2hw2-555x

Published

The following SVG will produce a link with a `javascript` scheme. If the user clicks this link, they will run it. ```svg <svg xmlns="http://www.w3.org/2000/svg"> <a> <set attributeName="href" to="javascript:alert('SET_XSS')"></set> <text y="30">Click set</text> </a> </svg> ``` ### Impact Allows stored XSS in applications that allow the `animate` and `set` tags. ### Patches Fixed in 3.3.3, 4.0.3, and 4.1.4 ### Workarounds Do not enable the `animate` or `set` tags.

Source published: 29 Sep 2026 23:09:16 UTC
Source modified: 29 Sep 2026 23:25:44 UTC
Observed here: 24 Oct 2026 13:19:54 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Publisher rating · MODERATE

osv · RUSTSEC-2026-0213

Published

The following SVG will produce a link with a javascript scheme. If the user clicks this link, they will run it. ```xml <svg xmlns="http://www.w3.org/2000/svg"> <a> <set attributeName="href" to="javascript:alert('SET_XSS')"></set> <text y="30">Click set</text> </a> </svg> ``` Ammonia did not apply attribute filters based on `attributeName`, so the contents of the `to`, `from`, and `values` tags were not sanitized as URLs. Applications that do not explicitly allow either of these tags should not be affected, since neither are allowed by default. --- **Discovered by:** [Younghun Ko (@koyokr)](https://github.com/koyokr)

Source published: 21 Jul 2026 12:00:00 UTC
Source modified: 30 Sep 2026 07:15:39 UTC
Observed here: 24 Oct 2026 13:19:54 UTC
Source terms: OSV · upstream source license applies

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.