| Name | CVE-2026-9079 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| curl (PTS) | bullseye | 7.74.0-1.3+deb11u13 | fixed |
| bullseye (security) | 7.74.0-1.3+deb11u16 | fixed |
| bookworm | 7.88.1-10+deb12u15 | fixed |
| bookworm (security) | 7.88.1-10+deb12u5 | fixed |
| trixie | 8.14.1-2+deb13u4 | vulnerable |
| forky | 8.20.0-5 | vulnerable |
| sid | 8.21.0-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| curl | source | bullseye | (not affected) | | | |
| curl | source | bookworm | (not affected) | | | |
| curl | source | (unstable) | 8.21.0~rc2-1 | | | |
Notes
[trixie] - curl <no-dsa> (Minor issue)
[bookworm] - curl <not-affected> (Vulnerable code not present)
[bullseye] - curl <not-affected> (Vulnerable code not present)
https://curl.se/docs/CVE-2026-9079.html
Introduced with: https://github.com/curl/curl/commit/d5e83eb745762f48d8fafadc5df5dd3ae8d8941e (curl-8_8_0)
Fixed by: https://github.com/curl/curl/commit/88c7e16cceec816a2df45c899d49b1e85513f193 (rc-8_21_0-1, curl-8_21_0)