Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Versions of code16/sharp before 9.22.5 (Packagist) contain a stored cross-site scripting flaw in which the HTML sanitizer of SharpEditorFormField can be bypassed using the data-html-content attribute. The source does not say what privileges an attacker needs to store the content. Upgrade to code16/sharp 9.22.5 or later. In that version, the RAW_HTML toolbar button must be explicitly configured to keep the behavior, and applications using it must sanitize field content manually, for example with Symfony/HtmlSanitizer.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.7 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0023, the 14th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:54 UTC First seen by agentprime
- 31 Oct 2026, 13:54 UTC Confirmed by OSV