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Mohanad
Cirrostratus
Nov 11, 2024Base64 decoding issue (JSON request)
Hello Everyone, i'm facing an issue with Base64 decoding on F5 ASM. the request body look like this: Original message before encoding { "data": { "name":"khaled", "Age":"30", "Car":"BMW...
SinemUlusoy
Mist
Feb 27, 2026I came accross the same problem. The request's content-type was JSON, and a file upload was being performed through a specific parameter. Although the parameter was defined as a User-Input value and Base64 decoding was enabled on the WAF/ASM side, I could not see the encoded content in the logs. Only thing that I see was lots of meta char and attack signature violations.
Did you find a workaround for this?
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