CVE-2026-86411
CVE-2026-86411 · FTP connection reuse inherits client-certificate
This page contains facts from public vulnerability sources. Check the original advisory before updating.
An `ftp://` transfer configured with `CURLUSESSL_NONE` can reuse a pooled FTP control connection that a previous easy handle upgraded with `STARTTLS` and authenticated using a client certificate. The second handle performs neither a new TLS handshake nor a new FTP login, so the server continues to authorize it under the first handle's certificate identity.
EPSS 0.1% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
curl
- Versions
- ≥ 8.21.0, ≤ 8.21.0: Affected (semver)
No fix published
curl Debian:14
- Versions
- 8.14.1-2
- 8.14.1-2+exp1
- 8.15.0-1
- 8.15.0-1~bpo13+1
- 8.15.0-1~exp1
- 8.15.0~rc1-1exp1
- 8.15.0~rc2-1~exp1
- 8.15.0~rc3-1~exp1
- 8.16.0-1
- 8.16.0-1+exp1
- 8.16.0-1~bpo13+1
- 8.16.0-2
- 8.16.0-3
- 8.16.0-4
- 8.16.0-4~bpo13+1
- 8.16.0~rc1-1~exp1
- 8.16.0~rc2-1
- 8.16.0~rc2-2
- 8.16.0~rc3-1
- 8.17.0-1
- 8.17.0-2
- 8.17.0-3
- 8.17.0~rc1-1~exp1
- 8.17.0~rc2-1
- 8.17.0~rc3-1
- 8.18.0-1
- 8.18.0-1~bpo13+1
- 8.18.0-2
- 8.18.0~rc1-1+exp1
- 8.18.0~rc2-1
- 8.18.0~rc3-1
- 8.19.0-1
- 8.19.0-1+exp1
- 8.19.0-1~bpo13+1
- 8.19.0-2
- 8.19.0-3
- 8.19.0-3+exp1
- 8.19.0-3+exp2
- 8.19.0~rc1-1~exp1
- 8.19.0~rc2-1
- 8.19.0~rc2-2
- 8.19.0~rc3-1
- 8.20.0-1
- 8.20.0-1+exp
- 8.20.0-2
- 8.20.0-2+exp1
- 8.20.0-2~bpo13+1
- 8.20.0-3
- 8.20.0-4
- 8.20.0-5
- 8.20.0-5~bpo13+1
- 8.20.0~rc1-1+exp1
- 8.20.0~rc1-1+exp2
- 8.20.0~rc1-1+exp3
- 8.20.0~rc2-1
- 8.20.0~rc2-1+exp1
- 8.20.0~rc3-1
- 8.20.0~rc3-1+exp1
- 8.21.0-1
- 8.21.0-1+exp1
- 8.21.0-2
- 8.21.0-2+exp1
- 8.21.0-2~bpo13+1
- 8.21.0~rc1-1+exp1
- 8.21.0~rc2-1
- 8.21.0~rc2-1+exp1
- 8.21.0~rc3-1
- 8.21.0~rc3-1+exp1
- 8.22.0~rc2-1
- 8.22.0~rc2-2
- 8.22.0~rc3-1
- 8.22.0~rc3-1+exp1
- Affected ranges
- ECOSYSTEM: < 8.22.0-1
Update to 8.22.0-1