CVE-2026-87862: HSTS cache import drops longer-lived child
Affected: curl · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 63% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- curl · curlfrom 8.22.0 up to and including 8.22.0; from 8.21.0 up to and including 8.21.0; from 8.20.0 up to and including 8.20.0; from 8.19.0 up to and including 8.19.0; from 8.18.0 up to and including 8.18.0; from 8.17.0 up to and including 8.17.0 and 9 more
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- curl
- Published
- October 2026
- Bounty reports
- 1 disclosed on HackerOne
Disclosed bug bounty reports about CVE-2026-87862
The reports on HackerOne that name this CVE, with HackerOne's own outcome. Titles and metadata only.
- CVE-2026-87862: HSTS cache import drops longer-lived childcurl · 2026Valid
CoverageNo articles yet
No CyberSIXT article names CVE-2026-87862 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.