CVE-2026-19931

Name
CVE-2026-19931
Description
A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
2499f714-1537-4658-8207-48ae4bb9eae9 https://curl.se/docs/CVE-2026-19931.html
2499f714-1537-4658-8207-48ae4bb9eae9 https://curl.se/docs/CVE-2026-19931.json
2499f714-1537-4658-8207-48ae4bb9eae9 https://hackerone.com/reports/3923520

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* curl >= 7.64.1 < 8.22.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
curl edge-main 8.22.0-r0 Achill Gilgenast <achill@achill.org> fixed
curl edge-main 8.21.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.20.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.20.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.19.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.18.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.17.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.17.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.16.0-r2 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.16.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.16.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.15.0-r2 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.15.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl edge-main 8.15.0-r0 fossdd <fossdd@pwned.life> possibly vulnerable
curl edge-main 8.14.1-r2 fossdd <fossdd@pwned.life> possibly vulnerable
curl edge-main 8.14.1-r1 fossdd <fossdd@pwned.life> possibly vulnerable
curl edge-main 8.14.1-r0 fossdd <fossdd@pwned.life> possibly vulnerable
curl edge-main 8.14.0-r2 fossdd <fossdd@pwned.life> possibly vulnerable
curl edge-main 8.14.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.14.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.13.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.13.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.12.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.12.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.12.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.11.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.11.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.11.0-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.11.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.10.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.9.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.9.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.7.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.6.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.5.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.4.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.3.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.1.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 8.0.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.88.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.87.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.86.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.85.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.84.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.83.1-r0 None possibly vulnerable
curl edge-main 7.83.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.79.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.78.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.77.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl edge-main 7.76.0-r0 None possibly vulnerable
curl edge-main 7.74.0-r0 None possibly vulnerable
curl edge-main 7.72.0-r0 None possibly vulnerable
curl edge-main 7.71.0-r0 None possibly vulnerable
curl edge-main 7.66.0-r0 None possibly vulnerable
curl edge-main 7.65.0-r0 None possibly vulnerable
curl 3.24-main 8.22.0-r0 Achill Gilgenast <achill@achill.org> fixed
curl 3.24-main 8.21.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl 3.24-main 8.20.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl 3.23-main 8.22.0-r0 Achill Gilgenast <achill@achill.org> fixed
curl 3.23-main 8.20.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl 3.23-main 8.19.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl 3.23-main 8.17.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
curl 3.22-main 8.14.1-r3 fossdd <fossdd@pwned.life> possibly vulnerable
curl 3.22-main 8.14.1-r2 fossdd <fossdd@pwned.life> possibly vulnerable
curl 3.22-main 8.14.1-r1 fossdd <fossdd@pwned.life> possibly vulnerable
curl 3.22-main 8.14.1-r0 None possibly vulnerable
curl 3.22-main 8.14.0-r0 None possibly vulnerable
curl 3.22-main 8.12.0-r0 None possibly vulnerable
curl 3.22-main 8.11.1-r0 None possibly vulnerable
curl 3.22-main 8.11.0-r0 None possibly vulnerable
curl 3.22-main 8.10.0-r0 None possibly vulnerable
curl 3.22-main 8.9.1-r0 None possibly vulnerable
curl 3.22-main 8.9.0-r0 None possibly vulnerable
curl 3.22-main 8.7.1-r0 None possibly vulnerable
curl 3.22-main 8.6.0-r0 None possibly vulnerable
curl 3.22-main 8.5.0-r0 None possibly vulnerable
curl 3.22-main 8.4.0-r0 None possibly vulnerable
curl 3.22-main 8.3.0-r0 None possibly vulnerable
curl 3.22-main 8.1.0-r0 None possibly vulnerable
curl 3.22-main 8.0.0-r0 None possibly vulnerable
curl 3.22-main 7.88.0-r0 None possibly vulnerable
curl 3.22-main 7.87.0-r0 None possibly vulnerable
curl 3.22-main 7.86.0-r0 None possibly vulnerable
curl 3.22-main 7.85.0-r0 None possibly vulnerable
curl 3.22-main 7.84.0-r0 None possibly vulnerable
curl 3.22-main 7.83.1-r0 None possibly vulnerable
curl 3.22-main 7.83.0-r0 None possibly vulnerable
curl 3.22-main 7.79.0-r0 None possibly vulnerable
curl 3.22-main 7.78.0-r0 None possibly vulnerable
curl 3.22-main 7.77.0-r0 None possibly vulnerable
curl 3.22-main 7.76.0-r0 None possibly vulnerable
curl 3.22-main 7.74.0-r0 None possibly vulnerable
curl 3.22-main 7.72.0-r0 None possibly vulnerable
curl 3.22-main 7.71.0-r0 None possibly vulnerable
curl 3.22-main 7.66.0-r0 None possibly vulnerable
curl 3.22-main 7.65.0-r0 None possibly vulnerable
curl 3.21-main 8.14.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.21-main 8.14.1-r0 None possibly vulnerable
curl 3.21-main 8.14.0-r0 None possibly vulnerable
curl 3.21-main 8.12.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.21-main 8.12.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.21-main 8.12.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.21-main 8.11.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.21-main 8.11.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.21-main 8.11.0-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.21-main 8.11.0-r0 None possibly vulnerable
curl 3.21-main 8.10.0-r0 None possibly vulnerable
curl 3.21-main 8.9.1-r0 None possibly vulnerable
curl 3.21-main 8.9.0-r0 None possibly vulnerable
curl 3.21-main 8.7.1-r0 None possibly vulnerable
curl 3.21-main 8.6.0-r0 None possibly vulnerable
curl 3.21-main 8.5.0-r0 None possibly vulnerable
curl 3.21-main 8.4.0-r0 None possibly vulnerable
curl 3.21-main 8.3.0-r0 None possibly vulnerable
curl 3.21-main 8.1.0-r0 None possibly vulnerable
curl 3.21-main 8.0.0-r0 None possibly vulnerable
curl 3.21-main 7.88.0-r0 None possibly vulnerable
curl 3.21-main 7.87.0-r0 None possibly vulnerable
curl 3.21-main 7.86.0-r0 None possibly vulnerable
curl 3.21-main 7.85.0-r0 None possibly vulnerable
curl 3.21-main 7.84.0-r0 None possibly vulnerable
curl 3.21-main 7.83.1-r0 None possibly vulnerable
curl 3.21-main 7.83.0-r0 None possibly vulnerable
curl 3.21-main 7.79.0-r0 None possibly vulnerable
curl 3.21-main 7.78.0-r0 None possibly vulnerable
curl 3.21-main 7.77.0-r0 None possibly vulnerable
curl 3.21-main 7.76.0-r0 None possibly vulnerable
curl 3.21-main 7.74.0-r0 None possibly vulnerable
curl 3.21-main 7.72.0-r0 None possibly vulnerable
curl 3.21-main 7.71.0-r0 None possibly vulnerable
curl 3.21-main 7.66.0-r0 None possibly vulnerable
curl 3.21-main 7.65.0-r0 None possibly vulnerable
curl 3.20-main 8.14.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.14.1-r0 None possibly vulnerable
curl 3.20-main 8.14.0-r0 None possibly vulnerable
curl 3.20-main 8.12.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.12.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.11.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.11.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.11.0-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.11.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.10.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.9.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.9.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.7.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.20-main 8.6.0-r0 None possibly vulnerable
curl 3.20-main 8.5.0-r0 None possibly vulnerable
curl 3.20-main 8.4.0-r0 None possibly vulnerable
curl 3.20-main 8.3.0-r0 None possibly vulnerable
curl 3.20-main 8.1.0-r0 None possibly vulnerable
curl 3.20-main 8.0.0-r0 None possibly vulnerable
curl 3.20-main 7.88.0-r0 None possibly vulnerable
curl 3.20-main 7.87.0-r0 None possibly vulnerable
curl 3.20-main 7.86.0-r0 None possibly vulnerable
curl 3.20-main 7.85.0-r0 None possibly vulnerable
curl 3.20-main 7.84.0-r0 None possibly vulnerable
curl 3.20-main 7.83.1-r0 None possibly vulnerable
curl 3.20-main 7.83.0-r0 None possibly vulnerable
curl 3.20-main 7.79.0-r0 None possibly vulnerable
curl 3.20-main 7.78.0-r0 None possibly vulnerable
curl 3.20-main 7.77.0-r0 None possibly vulnerable
curl 3.20-main 7.76.0-r0 None possibly vulnerable
curl 3.20-main 7.74.0-r0 None possibly vulnerable
curl 3.20-main 7.72.0-r0 None possibly vulnerable
curl 3.20-main 7.71.0-r0 None possibly vulnerable
curl 3.20-main 7.66.0-r0 None possibly vulnerable
curl 3.20-main 7.65.0-r0 None possibly vulnerable
curl 3.19-main 8.14.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.14.1-r0 None possibly vulnerable
curl 3.19-main 8.14.0-r0 None possibly vulnerable
curl 3.19-main 8.12.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.12.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.11.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.11.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.11.0-r0 None possibly vulnerable
curl 3.19-main 8.10.0-r0 None possibly vulnerable
curl 3.19-main 8.9.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.9.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.9.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.7.1-r0 None possibly vulnerable
curl 3.19-main 8.6.0-r0 None possibly vulnerable
curl 3.19-main 8.5.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
curl 3.19-main 8.4.0-r0 None possibly vulnerable
curl 3.19-main 8.3.0-r0 None possibly vulnerable
curl 3.19-main 8.1.0-r0 None possibly vulnerable
curl 3.19-main 8.0.0-r0 None possibly vulnerable
curl 3.19-main 7.88.0-r0 None possibly vulnerable
curl 3.19-main 7.87.0-r0 None possibly vulnerable
curl 3.19-main 7.86.0-r0 None possibly vulnerable
curl 3.19-main 7.85.0-r0 None possibly vulnerable
curl 3.19-main 7.84.0-r0 None possibly vulnerable
curl 3.19-main 7.83.1-r0 None possibly vulnerable
curl 3.19-main 7.83.0-r0 None possibly vulnerable
curl 3.19-main 7.79.0-r0 None possibly vulnerable
curl 3.19-main 7.78.0-r0 None possibly vulnerable
curl 3.19-main 7.77.0-r0 None possibly vulnerable
curl 3.19-main 7.76.0-r0 None possibly vulnerable
curl 3.19-main 7.74.0-r0 None possibly vulnerable
curl 3.19-main 7.72.0-r0 None possibly vulnerable
curl 3.19-main 7.71.0-r0 None possibly vulnerable
curl 3.19-main 7.66.0-r0 None possibly vulnerable
curl 3.19-main 7.65.0-r0 None possibly vulnerable