Portainer improperly uses an encryption algorithm in the AesEncrypt functionGHSA-9mjw-79r6-c9m8
HIGHGHSA-9mjw-79r6-c9m8 is a high-severity (CVSS 7.5) CWE-326 vulnerability in github.com/portainer/portainer. A fix is available for github.com/portainer/portainer — see the affected versions and patch details below.
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-9mjw-79r6-c9m8.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/portainer/portainerReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Portainer before 2.20.2 improperly uses an encryption algorithm in the AesEncrypt function.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/portainer/portainer | all versions | 2.20.2go get github.com/portainer/portainer@v2.20.2 |
Affected Products
portainerportainerDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/portainer/portainer, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/portainer/portainer to 2.20.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9mjw-79r6-c9m8 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is GHSA-9mjw-79r6-c9m8 in your dependencies?
Find it across Go, including transitive dependencies.