GCVE-110-CLOUD-2022-0031

Advisory Published

Vulnetix · Advisory published May 17, 2022

While testing rate-limiter protection, The researcher noticed that when forcing HTTP/1 requests and injecting a space after `X-Forwarded-For` he was able to override this specific header, letting him impersonate any IP. Any internal header could have beem overridden, also the one that should not be exposed/forwarded by the client, such as `CloudFront-Viewer-Country-Region` or any other `CloudFront` enhanced header. This special security issue was affecting all AWS users with that a specific setting enabled.

Download JSON Open in Console

Affected Products

Vendor	Product	Versions	Platforms
AWS	ELB	—	—
AWS	CloudFront	—	—

References

ELB Cache mechanism HTTP header smuggling

advisory

Browse GCVE Records

73,443 records in the GCVE database · Updated July 18, 2026

No matching records found.

Explore Further

Investigate this vulnerability in the interactive console or download the raw GCVE record.

Open in Console Download JSON