GHSA-pchf-49fh-w34r — soft-serve
Fix: charmbracelet/soft-serve@8539f9aGHSA-pchf-49fh-w34r is a CWE-289 vulnerability in github.com/charmbracelet/soft-serve. A fix is available for github.com/charmbracelet/soft-serve — see the affected versions and patch details below.
Soft Serve Affected by an Authentication Bypass
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-pchf-49fh-w34r.
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/charmbracelet/soft-serveReal-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
What kind of vulnerability is it? Who is impacted?
This issue impacts every Soft Serve instance.
A critical authentication bypass allows an attacker to impersonate any user (including Admin) by "offering" the victim's public key during the SSH handshake before authenticating with their own valid key. This occurs because the user identity is stored in the session context during the "offer" phase and is not cleared if that specific authentication attempt fails.
Patches
Has the problem been patched? What versions should users upgrade to?
Yes, please upgrade to version 0.11.3 as soon as possible.
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
You need to upgrade
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/charmbracelet/soft-serve | all versions | 0.11.3go get github.com/charmbracelet/soft-serve@v0.11.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/charmbracelet/soft-serve, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/charmbracelet/soft-serve to 0.11.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pchf-49fh-w34r 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-pchf-49fh-w34r can be triaged on real exposure rather than presence alone.
Tailored to GHSA-pchf-49fh-w34r. 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-pchf-49fh-w34r in your dependencies?
O3 Security finds GHSA-pchf-49fh-w34r across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.