GHSA-4j9m-h44m-2hv8

Source

https://github.com/advisories/GHSA-4j9m-h44m-2hv8

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-4j9m-h44m-2hv8/GHSA-4j9m-h44m-2hv8.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-4j9m-h44m-2hv8

Aliases

CVE-2026-50268

Published

2026-07-02T20:32:21Z

Modified

2026-07-02T20:45:17.868700036Z

Severity

1.9 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N CVSS Calculator

Summary

Steeltoe: OAEP setting silently selects PKCS#1 v1.5 padding

Details

Summary

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.

Impact

Operators who configure encrypt:rsa:algorithm=OAEP to obtain CCA2-secure padding receive PKCS#1 v1.5 instead. Currently, Decrypt() is called only against operator-controlled configuration data, so no exploitable path exists, but any future code path that exposes a decryption oracle would be Bleichenbacher-vulnerable despite the OAEP setting.

Migration note

Existing {cipher} values produced under the broken OAEP setting were encrypted with PKCS#1 v1.5. The fix makes OAEP use actual OAEP padding, so those values will fail to decrypt after upgrading. Re-encrypt all affected {cipher} values after upgrading.

Database specific

{
    "cwe_ids": [
        "CWE-256",
        "CWE-327"
    ],
    "severity": "LOW",
    "github_reviewed": true,
    "nvd_published_at": "2026-06-17T23:17:04Z",
    "github_reviewed_at": "2026-07-02T20:32:21Z"
}

References

Affected packages

NuGet / Steeltoe.Configuration.Encryption

Package

Name: Steeltoe.Configuration.Encryption; View open source insights on deps.dev
Purl: pkg:nuget/Steeltoe.Configuration.Encryption

Affected ranges

Type: ECOSYSTEM
Events: Introduced

4.0.0

Fixed

4.2.0

Affected versions

4.*

4.0.0

4.1.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-4j9m-h44m-2hv8/GHSA-4j9m-h44m-2hv8.json"

last_known_affected_version_range

"<= 4.1.0"