Riskcovery

CVE-2026-87862

HSTS cache import drops longer-lived child

State
Published
Severity
8.1 High
Published
Oct 20, 2026
Updated
Oct 30, 2026
Reserved
Sep 9, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

  • CWE-201 Insertion of Sensitive Information Into Sent Data

Affected Products

ProductVersions
curlcurl
  • 8.22.0 through 8.22.0Affected
  • 8.21.0 through 8.21.0Affected
  • 8.20.0 through 8.20.0Affected
  • 8.19.0 through 8.19.0Affected
  • 8.18.0 through 8.18.0Affected
  • 8.17.0 through 8.17.0Affected
  • 8.16.0 through 8.16.0Affected
  • 8.15.0 through 8.15.0Affected
  • 8.14.1 through 8.14.1Affected
  • 8.14.0 through 8.14.0Affected
  • 8.13.0 through 8.13.0Affected
  • 8.12.1 through 8.12.1Affected
  • 8.12.0 through 8.12.0Affected
  • 8.11.1 through 8.11.1Affected
  • 8.11.0 through 8.11.0Affected

References

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