GHSA-373w-rj84-pv6x — safeurl-python
Fix: IncludeSecurity/safeurl-python#6GHSA-373w-rj84-pv6x is a security vulnerability in safeurl-python. A fix is available for safeurl-python — see the affected versions and patch details below.
SafeURL-Python's hostname blocklist does not block FQDNs
Real-World Exposure
safeurl-pythonReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
Description
If a hostname was blacklisted, it was possible to bypass the blacklist by requesting the FQDN of the host (e.g. adding . to the end).
Impact
The main purpose of this library is to block requests to internal/private IPs and these cannot be bypassed using this finding. But if a library user had specifically set certain hostnames as blocked, then an attacker would be able to circumvent that block to cause SSRFs to request those hostnames.
Patches
Fixed by https://github.com/IncludeSecurity/safeurl-python/pull/6
Credit
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | safeurl-python | all versions | 1.3pip install --upgrade 'safeurl-python==1.3' |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for safeurl-python, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update safeurl-python to 1.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-373w-rj84-pv6x 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-373w-rj84-pv6x can be triaged on real exposure rather than presence alone.
Tailored to GHSA-373w-rj84-pv6x. 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-373w-rj84-pv6x in your dependencies?
O3 Security finds GHSA-373w-rj84-pv6x across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.