Bug 2461366 (CVE-2026-41305)
| Summary: | CVE-2026-41305 postcss: PostCSS: Cross-Site Scripting (XSS) via improper escaping of style closing tags | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | aazores, abarbaro, abrianik, akostadi, alcohan, alizardo, amasferr, anpicker, anthomas, anujha, aschwart, asoldano, aszczucz, bbaranow, bbrownin, bdettelb, bmaxwell, boliveir, bparees, brasmith, bstansbe, cdrage, chfoley, cmah, cmyers, cochase, dkeler, dlofthou, dmayorov, dnakabaa, doconnor, dranck, drichtar, dschmidt, dymurray, eaguilar, ebaron, eborisov, ehelms, erezende, ewittman, fdeutsch, ggainey, ggrzybek, gmalinko, gotiwari, gparvin, hasun, ibolton, istudens, ivassile, iweiss, janstey, jbalunas, jchui, jfula, jhe, jhorak, jkoehler, jlanda, jlledo, jmatthew, jmontleo, jolong, jowilson, jpasqual, jraez, juwatts, jwong, kaycoth, kshier, ktsao, lball, lchilton, lcouzens, lphiri, manissin, mhulan, mosmerov, mposolda, msvehla, mvyas, nboldt, ngough, nipatil, nmoumoul, nwallace, nyancey, oaljalju, omaciel, ometelka, oramraz, osousa, pahickey, pantinor, parichar, pberan, pcreech, pdelbell, pesilva, pgaikwad, pjindal, pmackay, prwatson, psrna, ptisnovs, rchan, rgodfrey, rhaigner, rhel-process-autobot, rjohnson, rkubis, rmartinc, rstancel, rstepani, rushinde, sdawley, sfeifer, simaishi, slucidi, smaestri, smallamp, smcdonal, smullick, sseago, ssilvert, stcannon, sthorger, stirabos, suppawar, swoodman, syedriko, tasato, teagle, thason, thjenkin, tmalecek, tsedmik, ttakamiy, vdosoudi, veshanka, vmuzikar, watson-tool-maintainers, xdharmai, yguenane |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in PostCSS. This vulnerability allows a remote attacker to perform Cross-Site Scripting (XSS) by submitting specially crafted CSS. When PostCSS processes and re-stringifies this CSS for embedding within HTML `<style>` tags, it fails to properly escape `</style>` sequences. This oversight enables the injected `</style>` to prematurely close the HTML style block, allowing the attacker to inject malicious scripts and execute arbitrary code in the user's browser context.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
OSIDB Bzimport
2026-04-24 03:01:32 UTC
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