Bug 2559395 (CVE-2026-114616)
| Summary: | CVE-2026-114616 authlib: authlib: Authentication bypass via zero-length HMAC key | ||
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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: | anpicker, anthomas, dfreiber, dkeler, doconnor, drow, dschmidt, ebourniv, ehelms, ggainey, hasun, ikhan, ilpinto, jburrell, jfula, jlanda, jowilson, jpasqual, juwatts, kshier, ltomasbo, mdellweg, mhayden, mhulan, nmoumoul, nyancey, ometelka, osousa, pcreech, ptisnovs, rbobbitt, rchan, rjohnson, sbunciak, sdoran, simaishi, smallamp, stcannon, suppawar, syedriko, thason, tmalecek, vkumar, xdharmai, yguenane, ykashtan |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in Authlib. The library improperly accepts zero-length key material during Hash-based Message Authentication Code (HMAC) signing and verification. If a host application verifies tokens using a secret that evaluates to an empty value, a remote attacker can generate predictable signatures for arbitrary token claims. This allows the attacker to forge authentic-looking tokens and bypass authentication controls.
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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: | |||
| Bug Depends On: | 2560032, 2560033, 2560034, 2560035, 2560037 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-10-22 21:34:25 UTC
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