VDB
CVE-2026-87862
CVE-2026-87862
PUBLISHED
CVSS 8.1 HIGH
Reported by curl · Published October 20, 2026
Importing a `includeSubDomains` parent HSTS entry before a longer-lived child entry, silently drops the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP requests rather than upgrading to HTTPS.
Risk Scores
CVSS 3.1
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| curl | curl | 8.22.0, 8.21.0, 8.20.0 |
| curl | curl | 8.11.0, 8.22.0, 8.21.0 |
| alpine | curl | 0 |
Timeline
- CVE Published
- Oct 14, 2026 PoC Published
- Oct 21, 2026 EPSS Score
- Oct 24, 2026 EPSS Score
- Oct 25, 2026 EPSS Score
- Oct 27, 2026 EPSS Score
- Oct 29, 2026 EPSS Score
- Oct 31, 2026 EPSS Score