Bug 2445120 (CVE-2026-28802)
| Summary: | CVE-2026-28802 authlib: Authlib: Signature verification bypass via malicious JWT allows unauthorized access | ||
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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: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | anthomas, bdettelb, dfreiber, doconnor, drow, dschmidt, ebourniv, ehelms, erezende, ggainey, hasun, jburrell, jlanda, juwatts, jwong, kshier, lgallett, mhulan, nmoumoul, nyancey, omaciel, osousa, pcreech, ptisnovs, rchan, sbunciak, simaishi, smallamp, smcdonal, stcannon, teagle, tmalecek, ttakamiy, vkumar, yguenane |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in Authlib, a Python library for building OAuth and OpenID Connect servers. A remote attacker can exploit this vulnerability by crafting a malicious JSON Web Token (JWT) with a "none" algorithm and an empty signature. This bypasses the expected signature verification, potentially allowing the attacker to forge tokens and gain unauthorized access or perform unauthorized actions within applications using Authlib.
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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
2026-03-06 07:02:12 UTC
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