CVE-2023-37266
CriticalCasaOS contains weak JWT secrets
Published Jul 17, 2023 · Updated Aug 12, 2026 · Also known as GHSA-m5q5-8mfw-p2hr, GO-2023-1931
Key Facts
Patch in the next maintenance window- CVE-2023-37266 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting CasaOS (Icewhale), github.com/IceWhaleTech/CasaOS (go).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 6.8% probability of exploitation in the next 30 days.
- Fixed versions are available, including github.com/IceWhaleTech/CasaOS 0.4.4, CasaOS 0.4.4.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
6.8%
Higher than 93.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as root on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit 705bf1f. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| CasaOSIcewhale | >= < 0.4.4 | 0.4.4 |
| github.com/IceWhaleTech/CasaOSgo | See advisory | 0.4.4 |
Patched Releases
github.com/IceWhaleTech/CasaOS
0.4.4
CasaOS
0.4.4
Timeline
Publicly disclosed
Jul 17, 2023
Last updated
Aug 12, 2026
Weakness Type
- CWE-287 Improper Authentication
- CWE-1391 Use of Weak Credentials
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37266.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-37266
- articlehttps://github.com/IceWhaleTech/CasaOS/commit/705bf1facbffd2ca40b159b0303132b6fdf657ad
- articlehttps://github.com/IceWhaleTech/CasaOS/security/advisories/GHSA-m5q5-8mfw-p2hr
FAQ
Common Questions.
CasaOS is an open-source Personal Cloud system.
Affected: CasaOS (Icewhale) versions >= < 0.4.4; github.com/IceWhaleTech/CasaOS (go). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including github.com/IceWhaleTech/CasaOS 0.4.4, CasaOS 0.4.4.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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