Rust advisories / pingora-core
Vulnerability HighRUSTSEC-2025-0037 · pingora-core
RUSTSEC-2025-0037: Pingora Request Smuggling and Cache Poisoning
Short answerA security vulnerability in the pingora-core crate: Pingora Request Smuggling and Cache Poisoning. GitHub rates it High. Fixed in 0.5.0: update to a fixed version.
| Crate | pingora-core |
|---|---|
| Type | Vulnerability |
| Affected versions | Before 0.5.0. |
| Fixed in | 0.5.0 |
| Severity | High (GitHub rating) |
| Published | 2025-05-22 |
| Last changed | 2025-10-28 |
| Also known as | CVE-2025-4366, GHSA-93c7-7xqw-w357 |
What to do
- See which version you have:
cargo tree -i pingora-core(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p pingora-core. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for examplepingora-core = "0.5.0") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Pingora versions prior to 0.5.0 which used the caching functionality in pingora-proxy did not properly drain the downstream request body on cache hits.
This allows an attacker to craft malicious HTTP/1.1 requests which could lead to request smuggling or cache poisoning.
This flaw was corrected in commit fda3317ec822678564d641e7cf1c9b77ee3759ff by ensuring that the downstream request body is always drained before a connection can be reused.
See the blog post for more information.
References
- Package: crates.io/crates/pingora-core
- Advisory: rustsec.org/advisories/RUSTSEC-2025-0037.html
- Web: blog.cloudflare.com/resolving-a-request-smuggling-vulnerability-in-pingora/
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Other advisories for pingora-core
- VulnerabilityRUSTSEC-2025-0070 · 2025-09-17Pingora MadeYouReset HTTP/2 vulnerability
- VulnerabilityRUSTSEC-2026-0033 · 2026-03-04HTTP Request Smuggling via Premature Upgrade
- VulnerabilityRUSTSEC-2026-0034 · 2026-03-04HTTP Request Smuggling via HTTP/1.0 and Transfer-Encoding Misparsing
- VulnerabilityGHSA-393w-9x6h-8gc7 · 2025-09-17Pingora update for MadeYouReset HTTP/2 vulnerability
Up next
Same cratepingora-core: security historyEvery advisory for this crate, and whether it is safe to use today.Read it next →Did this answer your question?