CVE-2019-16771

Name: CVE-2019-16771
Creator: NVD / NIST
Published: 2019-12-06T19:15:10.787+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.98%

Last modified Jun 17, 2026

CVE-2019-16771 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Versions of Armeria 0.85.0 through and including 0.96.0 are vulnerable to HTTP response splitting, which allows remote attackers to inject arbitrary HTTP headers via CRLF sequences when unsanitized data is used to populate the headers of an HTTP response. This vulnerability has been patched in 0.97.0. EPSS estimates a 0.98% chance of exploitation in the next 30 days.

Description

Versions of Armeria 0.85.0 through and including 0.96.0 are vulnerable to HTTP response splitting, which allows remote attackers to inject arbitrary HTTP headers via CRLF sequences when unsanitized data is used to populate the headers of an HTTP response. This vulnerability has been patched in 0.97.0. Potential impacts of this vulnerability include cross-user defacement, cache poisoning, Cross-site scripting (XSS), and page hijacking.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.98%

57.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linecorp	Armeria	>= 0.85.0, < 0.97.0

References

https://github.com/line/armeria/commit/b597f7a865a527a84ee3d6937075cfbb4470ed20Patch, Vendor Advisory
https://github.com/line/armeria/security/advisories/GHSA-35fr-h7jr-hh86Mailing List, Third Party Advisory
https://github.com/line/armeria/commit/b597f7a865a527a84ee3d6937075cfbb4470ed20Patch, Vendor Advisory
https://github.com/line/armeria/security/advisories/GHSA-35fr-h7jr-hh86Mailing List, Third Party Advisory

Timeline

Published: Dec 6, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16771?

How severe is CVE-2019-16771?

CVE-2019-16771 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16771?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16771?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST