CVE-2026-42337: 1Panel-dev MaxKB · Missing Authorization
Affects 1Panel-dev MaxKBSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium : upgrade to 2.8.1 when convenient.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.8.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 26 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade MaxKB and 1panel-dev/MaxKB to 2.8.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| 1Panel-devMaxKB | Affected
| Fixed in
|
GitHub1panel-dev/MaxKBpkg:github/1panel-dev/MaxKBOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade MaxKB to version 2.8.1 or later, where this broken access control vulnerability is fixed. Since the vendor has released a fixed version, applying this official update is the recommended remediation. No additional mitigation guidance is provided or required beyond updating.
Description
MaxKB versions 2.8.0 and earlier contain a broken access control vulnerability in the OSS file service URL fetch API endpoint (chat/api/oss/get_url). The endpoint fails to validate ownership of the application_id parameter, allowing unauthorized operations under other applications' policies. This issue is addressed in MaxKB version 2.8.1. The vulnerability has a medium severity with a CVSS 4.0 base score of 5.3.