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No exploitation reportedFix available

CVE-2021-38512

No exploitation reported by the sources we read.

  • Published2021-08-10
  • Fixed in3.0.0-beta.9 · 2.2.1
  • WeaknessCWE-444

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in the actix-http crate before 3.0.0-beta.9 for Rust. HTTP/1 request smuggling (aka HRS) can occur, potentially leading to credential disclosure.

Timeline

dates in UTC
  1. 2021-08-1023:15CVE publishedNVD

Versions per branch

OSV · NVD
actix-http
BranchAffectedFixed in
3.0≥ 3.0.0-0, < 3.0.0-beta.93.0.0-beta.9
2.2≥ 0.0.0-0, < 2.2.12.2.1
2.2< 2.2.12.2.1
Actix actix-http
BranchAffectedFixed in
3.0< 3.0.03.0.0
3.0= 3.0.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
34.x= 34no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2021-38512 Red Hat Product Security

    rust-actix-http: potential request smuggling capabilities due to lack of input validation

Full record on NVD

Fix

  1. Update actix-http to 3.0.0-beta.9 · 2.2.1

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2021-08-10
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-8928-2fgm-6x9x

Frequently asked questions

What is CVE-2021-38512?

An issue was discovered in the actix-http crate before 3.0.0-beta.9 for Rust. HTTP/1 request smuggling (aka HRS) can occur, potentially leading to credential disclosure.

Is CVE-2021-38512 actively exploited?

Active exploitation of CVE-2021-38512 has not been confirmed. Its EPSS score was 1.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-38512?

CVE-2021-38512 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record