CVE-2026-92106 dashbitco CVE debrief

Who should care

Defenders responsible for applications that use the lazy_html library, particularly those that parse untrusted HTML, filter documents or trees, and serialize them for display, should be aware of this vulnerability and take steps to mitigate it.

Why it matters

CVE-2026-92106 is a Cross-site Scripting (XSS) vulnerability in the lazy_html library that can be exploited via a parse and serialize round-trip of attacker-supplied HTML, affecting versions from 0.1.0 before 0.1.13. Defenders should prioritize verifying the version of lazy_html in use and applying patches or updates to mitigate the vulnerability.

• Defenders should verify the version of lazy_html in use and apply patches or updates to mitigate the vulnerability.
• Applications that parse untrusted HTML, filter documents or trees, and serialize them for display are at risk of XSS attacks.
• The vulnerability can be exploited via a parse and serialize round-trip of attacker-supplied HTML, which can lead to the execution of malicious code.

Technical summary

The lazy_html library is vulnerable to Cross-site Scripting (XSS) attacks due to improper neutralization of input during web page generation. The issue affects versions from 0.1.0 before 0.1.13 and can be exploited via a parse and serialize round-trip of attacker-supplied HTML. Specifically, the library fails to properly escape text within style or script elements inside SVG or MathML foreign content.

Defensive priority

Defenders should prioritize verifying the version of lazy_html in use and applying patches or updates to mitigate the vulnerability. This is particularly important for applications that parse untrusted HTML, filter documents or trees, and then serialize them for display.

Recommended defensive actions

• Verify the version of lazy_html in use and apply patches or updates to mitigate the vulnerability.
• Review applications that parse untrusted HTML, filter documents or trees, and serialize them for display to ensure they are not affected.
• Implement additional security measures, such as input validation and output encoding, to prevent XSS attacks.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The vulnerability is confirmed to exist in lazy_html versions from 0.1.0 before 0.1.13. The issue is caused by the library's handling of style or script elements within SVG or MathML foreign content, which can lead to mutation XSS attacks. Evidence from the source corpus includes references to the CVE Program record, NVD vulnerability detail, and various source references.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.