Bug 2491450 (CVE-2026-54279)

Summary: CVE-2026-54279 aiohttp: AIOHTTP: Host-Only Cookies Become Domain Cookies After CookieJar Persistence
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: adudiak, alinfoot, anpicker, anthomas, bbrownin, bdettelb, bparees, brasmith, cahl, cochase, dfreiber, doconnor, dranck, drow, dschmidt, dtrifiro, ehelms, erezende, ggainey, gtanzill, hasun, ilpinto, jburrell, jbuscemi, jdobes, jfula, jkoehler, jlanda, jmitchel, jowilson, jpasqual, jsamir, juwatts, jwong, kaycoth, kshier, lbrazdil, lichen, ljawale, lphiri, ltomasbo, luizcosta, mbarnett, mhulan, mminar, msilmser, nmoumoul, nweather, nyancey, omaciel, ometelka, orabin, osousa, pakotvan, pbohmill, pcreech, ptisnovs, rbiba, rbobbitt, rbryant, rchan, rjohnson, simaishi, smallamp, sskracic, stcannon, sthirugn, syedriko, teagle, tmalecek, tpfromme, ttakamiy, vkumar, weaton, xdharmai, xialiu, yguenane, ykashtan, zzhou
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in aiohttp (before 3.14.1). Host-only cookies saved with CookieJar.save() and later restored with CookieJar.load() lose their host-only flag, so cookies intended for a single host may be sent to subdomains after persistence.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-06-22 18:02:04 UTC
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, host-only cookies that are saved with CookieJar.save() and then restored later with CookieJar.load() lose their host-only status. This vulnerability is fixed in 3.14.1.