RUSTSEC-2026-0258: h2 unbounded empty DATA frames
Nobody has claimed this yet.
- Dominant language
- Rust
- Stars
- 147
- Forks
- 39
- Avg merge
- 16h 39m
- Merged PRs (30d)
- 2
Description
h2 unbounded empty DATA frames
| Details | |
|---|---|
| Package | h2 |
| Version | 0.4.14 |
| URL | https://github.com/hyperium/hyper/security/advisories/GHSA-q83h-524g-xf6h |
| Date | 2026-08-17 |
| Patched versions | >=0.4.16 |
The h2 crate, used internally by hyper, had a flaw that would accept and queue empty DATA frames without limit.
If streams were not actively drained, this could lead to unbounded memory usage, or a panic if the length overflows.
Low severity.
Patched in v0.4.16.
See advisory page for additional details.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the h2 package details and patched version in the issue, then read the linked hyper security advisory and RustSec advisory for the affected behavior. Check how this repository resolves h2 through hyper, update the dependency to a patched version at or above 0.4.16, and run the project's existing tests to confirm dependency resolution.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- security
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 68/100