| Name | CVE-2026-87862 |
| Description | 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. |
| 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) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| curl (PTS) | bookworm | 7.88.1-10+deb12u15 | fixed |
| bookworm (security) | 7.88.1-10+deb12u5 | fixed | |
| trixie | 8.14.1-2+deb13u5 | vulnerable | |
| trixie (security) | 8.14.1-2+deb13u7 | vulnerable | |
| forky | 8.22.0-1 | vulnerable | |
| sid | 8.23.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| curl | source | bookworm | (not affected) | |||
| curl | source | (unstable) | 8.23.0~rc1-1 |
[trixie] - curl <no-dsa> (Minor issue)
[bookworm] - curl <not-affected> (Vulnerable code not present)
https://curl.se/docs/CVE-2026-87862.html
Introduced with: https://github.com/curl/curl/commit/a94973805df96269bf3f3bf0a20ccb9887313316 (curl-8_11_0)
Fixed by: https://github.com/curl/curl/commit/a1614c3bcf1593eb524b37792124357d97a5429c (rc-8_23_0-1)