cve.bz

CVE-2021-41084

4.7 mediumEPSS 1.2%

Medium (4.7) in typelevel http4s. EPSS 1.2% chance of exploitation in the next 30 days. Fixed in org.http4s:http4s-client_2.12 0.21.29, 0.22.5, 0.23.4.

http4s is an open source scala interface for HTTP. In affected versions http4s is vulnerable to response-splitting or request-splitting attacks when untrusted user input is used to create any of the following fields: Header names (`Header.name`å), Header values (`Header.value`), Status reason phrases (`Status.reason`), URI paths (`Uri.Path`), URI authority registered names (`URI.RegName`) (through 0.21). This issue has been resolved in versions 0.21.30, 0.22.5, 0.23.4, and 1.0.0-M27 perform the following. As a matter of practice http4s services and client applications should sanitize any user input in the aforementioned fields before returning a request or response to the backend. The carriage return, newline, and null characters are the most threatening.

Severity

CVSS 3.1

4.7 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
EPSS
1.2% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)
CWEs
CWE-74, CWE-918
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_2.12<0.21.290.21.29
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_2.12>=0.22.0 <0.22.50.22.5
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_2.12>=0.23.0 <0.23.40.23.4
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_2.13<0.21.290.21.29
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_2.13>=0.22.0 <0.22.50.22.5
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_2.13>=0.23.0 <0.23.40.23.4
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_3<0.21.290.21.29
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_3>=0.22.0 <0.22.50.22.5
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-client_3>=0.23.0 <0.23.40.23.4
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.10<=0.21.28no fix published
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.11<=0.21.28no fix published
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.12<0.21.290.21.29
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.12>=0.22.0 <0.22.50.22.5
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.12>=0.23.0 <0.23.40.23.4
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.13<0.21.290.21.29
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.13>=0.22.0 <0.22.50.22.5
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.13>=0.23.0 <0.23.40.23.4
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_2.13.0-M5<=0.21.28no fix published
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_3>=0.22.0 <0.22.50.22.5
GHSA-5vcm-3xc3-w7x3Mavenorg.http4s:http4s-server_3>=0.23.0 <0.23.40.23.4

References

Check your stackJSON