Vulnerability · Published Jun 17, 2026 · Assigned by GitHub_M
CVE-2026-50268Steeltoe: OAEP setting silently selects PKCS#1 v1.5 padding
Low 1.9
In plain English
A low-severity broken cryptography in Steeltoe.Configuration.Encryption from SteeltoeOSS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.0% (higher than 0% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. In Steeltoe.Configuration.Encryption 4.0.0 through 4.1.0, configuring `encrypt:rsa:algorithm=OAEP` does not enable OAEP encryption. Due to an incorrect BouncyCastle transformation string, the `OAEP` setting selects PKCS#1 v1.5, which is the same algorithm as the `DEFAULT` setting. Steeltoe.Configuration.Encryption version 4.2.0 patches the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | steeltoe.configuration.encryption | 4.2.0 | GHSA-4j9m-h44m-2hv8 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SteeltoeOSS | Steeltoe.Configuration.Encryption | >= 4.0.0, < 4.2.0 |
Weakness: CWE-256, CWE-327 · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N