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

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Summary

CVECVE-2026-50268
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-17 23:17:04 UTC
Updated2026-06-18 14:17:29 UTC
DescriptionSteeltoe 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.

Risk And Classification

Primary CVSS: v3.1 1.9 LOW from [email protected]

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.000460000 probability, percentile 0.000010000 (date 2026-06-18)

Problem Types: CWE-256 | CWE-327 | CWE-256 CWE-256: Plaintext Storage of a Password | CWE-327 CWE-327: Use of a Broken or Risky Cryptographic Algorithm

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary1.9LOWCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED1.9LOWCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SteeltoeOSS Steeltoe.Configuration.Encryption affected >= 4.0.0, < 4.2.0 Not specified

References

ReferenceSourceLinkTags
github.com/SteeltoeOSS/Steeltoe/commit/6cfee5cccddf8f9a31de69b0ca5ccdd77... [email protected] github.com
github.com/SteeltoeOSS/security-advisories/security/advisories/GHSA-4j9m... [email protected] github.com
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