7.5

CVE-2021-38512: actix actix-http HTTP Request/Response Smuggling

Modified
AliasesGHSA-8928-2fgm-6x9xRUSTSEC-2021-0081
Published 10-08-2021Last modified 04-08-2024

Vulnerability summary

CVE-2021-38512 is a high (CVSS 7.5) HTTP Request/Response Smuggling vulnerability in actix actix-http. EPSS estimates a 1.81% chance of exploitation in the next 30 days, higher than 78.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.81%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Timeline

  1. 10-08-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.81%

Chance of exploitation in the next 30 days

Percentile

78%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.81% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (raw.githubusercontent.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Actix1 product
  • actix-http< 3.0.0 | 3.0.0 | 3.0.0:beta1 | 3.0.0:beta2 | 3.0.0:beta3 | 3.0.0:beta4 | 3.0.0:beta5 | 3.0.0:beta6 | 3.0.0:beta7 | 3.0.0:beta8
Crates.Io1 product
  • actix-http< 2.2.1 | ≥ 3.0.0-0, < 3.0.0-beta.9
Fedoraproject1 product

3 vendors · 3 products

References

9 links