GHSA-99j7-mhfh-w84p
HIGHSlack Morphism for Rust before 0.41.0 can leak Slack OAuth client information in application debug logs
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.
Blast Radius
slack-morphismReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Potential/accidental leaking of Slack OAuth client information in application debug logs.
Patches
More strict and secure debug formatting was introduced in v0.41 for OAuth secret types to avoid the possibility of printing sensitive information in application logs.
Workarounds
Don't print/output in logs request and responses for OAuth and client configurations.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the repo
- Email us at [email protected]
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | slack-morphism | all versions | 0.41.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for slack-morphism. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update slack-morphism to 0.41.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-99j7-mhfh-w84p 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 pinpoints whether GHSA-99j7-mhfh-w84p is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-99j7-mhfh-w84p. 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-99j7-mhfh-w84p in your dependencies?
O3 detects GHSA-99j7-mhfh-w84p across crates.io dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.