CVE-2026-9079

EUVD-2026-41510
libcurl had a flaw that when instructed to clear proxy authentication
credentials which made it not do so, leaving the old credentials around to get
used for subsequent transfers that should not know nor use them.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
curlCNA
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 45.11%
Affected Products (NVD)
VendorProductVersion
haxxcurl
8.8.0 ≤
𝑥
< 8.21.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
curlcurl
𝑥
≤ 8.20.0
CNA
curlcurl
𝑥
≤ 8.19.0
CNA
curlcurl
𝑥
≤ 8.18.0
CNA
curlcurl
𝑥
≤ 8.17.0
CNA
curlcurl
𝑥
≤ 8.16.0
CNA
curlcurl
𝑥
≤ 8.15.0
CNA
curlcurl
𝑥
≤ 8.14.1
CNA
curlcurl
𝑥
≤ 8.14.0
CNA
curlcurl
𝑥
≤ 8.13.0
CNA
curlcurl
𝑥
≤ 8.12.1
CNA
curlcurl
𝑥
≤ 8.12.0
CNA
curlcurl
𝑥
≤ 8.11.1
CNA
curlcurl
𝑥
≤ 8.11.0
CNA
curlcurl
𝑥
≤ 8.10.1
CNA
curlcurl
𝑥
≤ 8.10.0
CNA
curlcurl
𝑥
≤ 8.9.1
CNA
curlcurl
𝑥
≤ 8.9.0
CNA
curlcurl
𝑥
≤ 8.8.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
curl
bookworm
7.88.1-10+deb12u15
fixed
bookworm (security)
7.88.1-10+deb12u5
fixed
bullseye
7.74.0-1.3+deb11u13
fixed
bullseye (security)
7.74.0-1.3+deb11u16
fixed
forky
8.21.0-2
fixed
sid
8.21.0-2
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
curl
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
questing
Fixed 8.14.1-2ubuntu1.4
released
resolute
Fixed 8.18.0-1ubuntu2.2
released
trusty
not-affected
xenial
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
curl
suse enterprise desktop 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise sap 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise server 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.46.1
fixed
suse enterprise server 15 SP7
8.14.1-150700.7.20.1
fixed
libcurl-devel
suse enterprise desktop 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise sap 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise server 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.46.1
fixed
suse enterprise server 15 SP7
8.14.1-150700.7.20.1
fixed
libcurl4
suse enterprise desktop 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise sap 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise server 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.46.1
fixed
suse enterprise server 15 SP7
8.14.1-150700.7.20.1
fixed
libcurl4-32bit
suse enterprise desktop 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise sap 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise sap 15 SP7
8.14.1-150700.7.20.1
fixed
suse enterprise server 15 SP4
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP5
8.14.1-150400.5.86.1
fixed
suse enterprise server 15 SP6
8.14.1-150600.4.46.1
fixed
suse enterprise server 15 SP7
8.14.1-150700.7.20.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
cmake
Azure Linux 3.0
0:3.30.3-15.azl3
fixed
curl
Azure Linux 3.0
0:8.11.1-10.azl3
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://curl.se/docs/CVE-2026-9079.html
https://curl.se/docs/CVE-2026-9079.json
https://hackerone.com/reports/3750295
https://hackerone.com/reports/3750295