GHSA-67rj-pjg6-pq59 is a high-severity (CVSS 7.5) Broken Cryptographic Algorithm vulnerability in net.gleske:jervis. A fix is available for net.gleske:jervis — see the affected versions and patch details below.
Jervis Has a SHA-256 Hex String Padding Bug
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- 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-67rj-pjg6-pq59.
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.
How urgent is this, really
GHSA-67rj-pjg6-pq59 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
net.gleske:jervisReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Vulnerability
padLeft(32, '0') should be padLeft(64, '0'). SHA-256 produces 32 bytes = 64 hex characters.
Impact
- Inconsistent hash lengths when leading bytes are zero
- Comparison failures for hashes with leading zeros
- Potential security issues in hash-based comparisons
- Could cause subtle bugs in systems relying on consistent hash lengths
Severity is considered low for internal uses of this library but if there's any consumer using these methods directly then this is considered high.
Patches
Upgrade to Jervis 2.2.
Workarounds
Use an alternate SHA-256 hash function or upgrade.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | net.gleske:jervis | all versions | 2.2net.gleske:jervis:2.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for net.gleske:jervis, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update net.gleske:jervis to 2.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-67rj-pjg6-pq59 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-67rj-pjg6-pq59 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-67rj-pjg6-pq59. 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-67rj-pjg6-pq59 in your dependencies?
O3 Security finds GHSA-67rj-pjg6-pq59 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.