CVE-2026-50090: The Aqara Cloud OAuth Authorization Endpoint (open-cn.aqara.com/oauth/authorize) is vulnerable to a redirect b

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CRITICAL 9.3DOWNGRADE

CVE-2026-50090 is a critical-severity flaw (CVSS 9.3) affecting cloud oauth authorization endpoint. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Aqara Cloud OAuth Authorization Endpoint (open-cn.aqara.com/oauth/authorize) is vulnerable to a redirect bypass due to lax controls on domain matching, which is an instance of "CWE-1289: Improper Validation of Unsafe Equivalence in Input" and has an estimated CVSS of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N (9.3 Critical).

Why this priority

Critical severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-1289
Published	2026-06-12
Last modified	2026-10-26

Publisher (CNA): runZero · Vendor: aqara

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-12 16:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

aqara cloud oauth authorization endpoint DOWNGRADE

Affected: 2026-04-20

Fixed in: no fixed release known

Safe to downgrade to: a release before 2026-04-20

1. Check installed version

apt-cache policy cloud-oauth-authorization-endpoint || rpm -q cloud-oauth-authorization-endpoint || cloud-oauth-authorization-endpoint --version

2. No fixed release: DOWNGRADE to a release before 2026-04-20 (Debian / Ubuntu)

apt-cache madison cloud-oauth-authorization-endpoint sudo apt install cloud-oauth-authorization-endpoint=<VERSION_BEFORE_2026-04-20> sudo apt-mark hold cloud-oauth-authorization-endpoint

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cloud-oauth-authorization-endpoint sudo dnf downgrade cloud-oauth-authorization-endpoint-<VERSION_BEFORE_2026-04-20> sudo dnf versionlock add cloud-oauth-authorization-endpoint

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-50090?

cloud oauth authorization endpoint: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-50090 being exploited?

CVE-2026-50090 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-50090 affect?

CVE-2026-50090 affects cloud oauth authorization endpoint. Severity is critical (CVSS 9.3). The Aqara Cloud OAuth Authorization Endpoint (open-cn.aqara.com/oauth/authorize) is vulnerable to a redirect bypass due to lax controls on domain matching, which is an instance of "CWE-1289: Improper Validation of Unsafe Equivalence in Inpu

How urgent is CVE-2026-50090?

Priority 41/100. Critical severity; Public exploit reference

References

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