AIKIDO-2025-10587
Altinn.App.Api is vulnerable to Generation of Error Message Containing Sensitive Information
20
Low Risk
This Affects:
Altinn.App.ApiTL;DR
Affected versions of this package are vulnerable to improper input validation in the handling of malformed Content-Disposition filenames. When an invalid or unquoted filename is supplied, the server responds with an internal error (HTTP 500) instead of a client error (HTTP 400). This behavior can inadvertently leak internal details or implementation-specific error messages to an attacker, increasing the risk of information disclosure. The patch fixes this by validating the header properly and returning a 400 Bad Request instead of a 500.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
Altinn.App.Api is vulnerable to Generation of Error Message Containing Sensitive Information in versions 7.2.0 - 8.7.0.
How to fix this
Upgrade the Altinn.App.Api library to the patch version.
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