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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. 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.
FEDORA-2026-938b1c0296 (python-nh3-0.3.7-2.fc46 and rust-ammonia-4.1.8-1.fc46) has been submitted as an update to Fedora 46. https://bodhi.fedoraproject.org/updates/FEDORA-2026-938b1c0296
FEDORA-2026-0c4e4a39a0 (python-nh3-0.3.7-2.fc45 and rust-ammonia-4.1.8-1.fc45) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-0c4e4a39a0
FEDORA-2026-481989221d (python-nh3-0.3.7-2.fc44 and rust-ammonia-4.1.8-1.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-481989221d
FEDORA-2026-501e3b2abf (python-nh3-0.2.21-10.fc43 and rust-ammonia-4.1.8-1.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2026-501e3b2abf
FEDORA-2026-938b1c0296 (python-nh3-0.3.7-2.fc46 and rust-ammonia-4.1.8-1.fc46) has been pushed to the Fedora 46 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-0c4e4a39a0 has been pushed to the Fedora 45 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-0c4e4a39a0` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0c4e4a39a0 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-501e3b2abf has been pushed to the Fedora 43 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-501e3b2abf` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-501e3b2abf See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-481989221d has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-481989221d` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-481989221d See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-481989221d (python-nh3-0.3.7-2.fc44 and rust-ammonia-4.1.8-1.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-501e3b2abf (python-nh3-0.2.21-10.fc43 and rust-ammonia-4.1.8-1.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-0c4e4a39a0 (python-nh3-0.3.7-2.fc45 and rust-ammonia-4.1.8-1.fc45) has been pushed to the Fedora 45 stable repository. If problem still persists, please make note of it in this bug report.