GHSA-w7hm-hmxv-pvhf
HIGHHPACK decoder panics on invalid input
Blast Radius
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Description
Due to insufficient checking of input data, decoding certain data sequences can lead to Decoder::decode panicking rather than returning an error.
Example code that triggers this vulnerability looks like this:
use hpack::Decoder;
pub fn main() {
let input = &[0x3f];
let mut decoder = Decoder::new();
let _ = decoder.decode(input);
}
hpack is unmaintained. A crate with the panics fixed has been published as hpack-patched.
Also consider using fluke-hpack or httlib-huffman as an alternative.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | hpack | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for hpack. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of hpack has shipped for GHSA-w7hm-hmxv-pvhf yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-w7hm-hmxv-pvhf is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-w7hm-hmxv-pvhf. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-w7hm-hmxv-pvhf in your dependencies?
O3 detects GHSA-w7hm-hmxv-pvhf across crates.io dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.