GHSA-87mp-xc4x-x8rh — asymmetricrypt/asymmetric…
Fix: Cosmicist/AsymmetriCrypt#5GHSA-87mp-xc4x-x8rh is a security vulnerability in asymmetricrypt/asymmetricrypt. No vendor fix is recorded yet; mitigation options are listed below.
asymmetricrypt/asymmetricrypt Padding Oracle Vulnerability in RSA Encryption
Real-World Exposure
asymmetricrypt/asymmetricryptReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
The encryption and decryption process were vulnerable against the Bleichenbacher's attack, which is a padding oracle vulnerability disclosed in the 98'. The issue was about the wrong padding utilized, which allowed to retrieve the encrypted content. The OPENSSL_PKCS1_PADDING version, aka PKCS v1.5 was vulnerable (is the one set by default when using openssl_* methods), while the PKCS v2.0 isn't anymore (it's also called OAEP).
A fix for this vulnerability was merged at https://github.com/Cosmicist/AsymmetriCrypt/pull/5/commits/a0318cfc5022f2a7715322dba3ff91d475ace7c6.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | asymmetricrypt/asymmetricrypt | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for asymmetricrypt/asymmetricrypt, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of asymmetricrypt/asymmetricrypt has shipped for GHSA-87mp-xc4x-x8rh yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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-87mp-xc4x-x8rh can be triaged on real exposure rather than presence alone.
Tailored to GHSA-87mp-xc4x-x8rh. 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-87mp-xc4x-x8rh in your dependencies?
O3 Security finds GHSA-87mp-xc4x-x8rh across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.