Bug 2491492 (CVE-2026-53663)

Summary: CVE-2026-53663 react-router: @remix-run/server-runtime: React Router: Insufficient CSRF protection allows integrity impact
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: aazores, abarbaro, abokovoy, abrianik, adudiak, alizardo, amctagga, anjoseph, anpicker, ansmith, anthomas, anujha, aoconnor, aschwart, asoldano, aszczucz, ataylor, bbaranow, bdettelb, bmaxwell, bniver, boliveir, bparees, brasmith, bstansbe, cdrage, cmah, cmyers, cochase, dbosanac, dbruscin, dlofthou, dnakabaa, doconnor, dranck, drichtar, dschmidt, dymurray, eaguilar, ebaron, eborisov, eglynn, ehelms, ehugonne, erezende, ewittman, fdeutsch, flucifre, fmariani, frenaud, ftrivino, ggainey, ggrzybek, gmalinko, gmeno, gnaik, gotiwari, gparvin, groman, hasun, ibolton, istudens, ivassile, iweiss, janstey, jchui, jfula, jhe, jhorak, jjoyce, jkoehler, jlanda, jmatthew, jmontleo, jolong, jowilson, jpasqual, jprabhak, jpretori, jraez, jreimann, jschluet, juwatts, jwon, kaycoth, kbempah, kshier, ktsao, kvanderr, lball, lchilton, lcouzens, lhh, lphiri, manissin, mbarnett, mbenjamin, mburns, mcarlett, mdessi, mgarciac, mhackett, mhulan, mosmerov, mposolda, mrizzi, msvehla, mvyas, mwringe, nboldt, ngough, nipatil, nmoumoul, nwallace, nyancey, oaljalju, ometelka, oramraz, osousa, pahickey, pantinor, parichar, pcattana, pcreech, pdelbell, pesilva, pgaikwad, pjindal, pmackay, prwatson, psrna, ptisnovs, rchan, rhaigner, rhel-process-autobot, rjohnson, rkubis, rmartinc, rstancel, rstepani, rushinde, sdawley, sfeifer, simaishi, slucidi, smallamp, smullick, solenoci, sostapov, sseago, ssilvert, stcannon, sthorger, stirabos, syedriko, tasato, tcunning, teagle, thason, thjenkin, tmalecek, vdosoudi, vereddy, veshanka, vmuzikar, watson-tool-maintainers, wtam, xdharmai, yfang, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---Flags: abokovoy: needinfo? (gnaik)
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in React Router. Insufficient Cross-Site Request Forgery (CSRF) checks in the framework mode allow a remote attacker to bypass these protections on PUT, PATCH, and DELETE requests. This could lead to a low integrity impact, where an attacker might be able to perform unintended actions on behalf of a user. Modern browser security features, such as Cross-Origin Resource Sharing (CORS) preflight and SameSite cookies, significantly limit the practical exploitability of this vulnerability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-06-22 19:02:00 UTC
React Router is a router for React. From 7.12.0 until 7.15.1, certain CSRF checks in React Router v7 Framework Mode were insufficient and run on POST requests, but were bypassed on PUT/PATCH/DELETE requests. This is a low severity vulnerability because modern browser protections (CORS preflight, SameSite cookies) already block the cross-origin attack vectors that this missing CSRF check would otherwise gate. This vulnerability is fixed in 7.15.1.