RUSTSEC-2026-0419 Unbounded memory use on large request bodies
- Exploited in the wild
- Not known
- Fix
- Available
What is RUSTSEC-2026-0419?
RUSTSEC-2026-0419 is a vulnerability in juniper_warp, published on 29 Oct 2026.
Official description
The make_graphql_filter() and make_graphql_filter_sync() filters of juniper_warp read the whole body of a POST request into memory before they parsed the body. The filters had no limit on the size of the body. A client could thus send a large body and exhaust the memory of the server. The request needs no authentication.
juniper_warp 0.9.1 reads at most 2 MiB of a request body by default. The filters respond with 413 Payload Too Large to larger bodies. make_graphql_filter_with_body_limit() and make_graphql_filter_sync_with_body_limit() set another limit.
Which versions are affected by RUSTSEC-2026-0419?
1 open source package ship an affected version, including juniper_warp.
| Package | Affected | Fixed in |
|---|---|---|
juniper_warp crates.io | From 0.0.0-0 | 0.9.1 |
How do I fix RUSTSEC-2026-0419?
Upgrade juniper_warp to 0.9.1 or later.
Is RUSTSEC-2026-0419 being exploited?
There is no known exploitation of RUSTSEC-2026-0419 in the wild and no public exploit code.
Sources
Also known as GHSA-fj3h-2jc3-973v.