GHSA-6943-qr24-82vx — v2
Fix: drakkan/sftpgo@f30a9a2GHSA-6943-qr24-82vx is a Broken Cryptographic Algorithm vulnerability in github.com/drakkan/sftpgo/v2. A fix is available for github.com/drakkan/sftpgo/v2 — see the affected versions and patch details below.
sftpgo vulnerable to brute force takeover of OpenID Connect session cookies
Exploitation Status
No confirmed exploitation observed yet
- 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-6943-qr24-82vx.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Real-World Exposure
github.com/drakkan/sftpgo/v2Real-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
Impact
The OpenID Connect implementation, in the affected SFTPGo versions, allows authenticated users to brute force session cookies and thereby gain access to other users' data, since the cookies are generated predictably using the xid library and are therefore unique but not cryptographically secure.
Patches
This issue was fixed in version v2.6.4, where cookies are opaque and cryptographically secure strings.
References
https://github.com/drakkan/sftpgo/commit/f30a9a2095bf90c0661b04fe038e3b7efc788bc6
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/drakkan/sftpgo/v2 | ≥ 2.3.0&&< 2.6.4 | 2.6.4go get github.com/drakkan/sftpgo/v2@v2.6.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/drakkan/sftpgo/v2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/drakkan/sftpgo/v2 to 2.6.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6943-qr24-82vx 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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-6943-qr24-82vx can be triaged on real exposure rather than presence alone.
Tailored to GHSA-6943-qr24-82vx. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-6943-qr24-82vx in your dependencies?
O3 Security finds GHSA-6943-qr24-82vx across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.