Bug 2482364 (CVE-2026-44681)

Summary: CVE-2026-44681 authlib: Authlib: Open Redirect vulnerability via omitted OpenID scope in authorization request
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anpicker, anthomas, dfreiber, dkeler, doconnor, drow, dschmidt, ebourniv, ehelms, ggainey, hasun, ilpinto, jburrell, jfula, jlanda, jowilson, jpasqual, juwatts, kshier, lblicha, ltomasbo, mdellweg, mhayden, mhulan, nmoumoul, nyancey, ogajduse, ometelka, osousa, pcreech, ptisnovs, rbobbitt, rchan, rjohnson, sbunciak, sdoran, simaishi, smallamp, stcannon, suppawar, syedriko, thason, tmalecek, vkumar, xdharmai, yguenane, ykashtan, zhunting
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Authlib, a Python library for building OAuth and OpenID Connect servers. A remote attacker can exploit an unauthenticated open redirect vulnerability in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint. By submitting an authorization request that omits the 'openid' scope, the attacker can cause the authorization server to redirect a user to an attacker-chosen URL. This could lead to information disclosure or phishing attacks.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2568056, 2568057, 2568058, 2568059, 2568060    
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Description OSIDB Bzimport 2026-05-27 20:01:49 UTC 
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.12 and 1.7.1, an unauthenticated open redirect in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint lets a remote attacker cause the authorization server to issue an HTTP 302 to an attacker-chosen URL by submitting an authorization request that omits the openid scope. This vulnerability is fixed in 1.6.12 and 1.7.1.