- 5.3MediumCVSS base score
- 59.7%Exploitation in 30 daysEPSS · top 0.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Apache HTTP Server versions 2.4.6 to 2.4.46 mod_proxy_wstunnel configured on an URL that is not necessarily Upgraded by the origin server was tunneling the whole connection regardless, thus allowing for subsequent requests on the same connection to pass through with no HTTP validation, authentication or authorization possibly configured.
Timeline
ID reserved
By apache
- 20 months later
· 20 months later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 59.7% · top 0.9% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
Apache Software Foundation · Apache HTTP Server
- affected 2.4.46
- affected 2.4.43
- affected 2.4.41
- affected 2.4.39
- affected 2.4.38
- affected 2.4.37
- affected 2.4.35
- affected 2.4.34
- affected 2.4.33
- affected 2.4.29
- affected 2.4.28
- affected 2.4.27
- affected 2.4.26
- affected 2.4.25
- affected 2.4.23
- affected 2.4.20
- affected 2.4.18
- affected 2.4.17
- affected 2.4.16
- affected 2.4.12
- affected 2.4.10
- affected 2.4.9
- affected 2.4.7
- affected 2.4.6
References
References11
- http://httpd.apache.org/security/vulnerabilities_24.html (opens in a new tab)x_transferred
- https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E (opens in a new tab)x_transferred
- [httpd-announce] 20210609 CVE-2019-17567: mod_proxy_wstunnel tunneling of non Upgraded connections (opens in a new tab)mailing-listx_transferred
- [httpd-dev] 20210610 Re: svn commit: r1890598 - in /httpd/site/trunk/content/security/json: CVE-2019-17567.json CVE-2020-13938.json CVE-2020-13950.json CVE-2020-35452.json CVE-2021-26690.json CVE-2021-26691.json CVE-2021-30641.json CVE-2021-31618.json (opens in a new tab)mailing-listx_transferred
- [oss-security] 20210609 CVE-2019-17567: Apache httpd: mod_proxy_wstunnel tunneling of non Upgraded connections (opens in a new tab)mailing-listx_transferred
- GLSA-202107-38 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-dce7e7738e (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-e3f6dd670d (opens in a new tab)vendor-advisoryx_transferred
- https://www.oracle.com/security-alerts/cpuoct2021.html (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20210702-0001/ (opens in a new tab)x_transferred
- [debian-lts-announce] 20240525 [SECURITY] [DLA 3818-1] apache2 security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-7905 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-17567)Record last updated .