CVE-2026-87862: HSTS cache import drops longer-lived child

Published Oct 14, 2026
·
Updated

HSTS cache import drops longer-lived child

Other sources

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.

— MITRE

Affected Software

11 affected componentsFixes available
alpine/curl<8.23.0-r0
8.23.0-r0
alpine/curl<8.23.0-r0
8.23.0-r0
debian/curl*
debian/curl*
debian/curl<=8.14.1-2+deb13u5, <=8.14.1-2+deb13u7, <=8.22.0-1
7.88.1-10+deb12u157.88.1-10+deb12u58.23.0-1
ubuntu/curl<7.81.0-1ubuntu1.30
7.81.0-1ubuntu1.30
ubuntu/curl<8.5.0-2ubuntu10.16
8.5.0-2ubuntu10.16
ubuntu/curl<8.20.0-2ubuntu11.1
8.20.0-2ubuntu11.1
ubuntu/curl<8.18.0-1ubuntu2.8
8.18.0-1ubuntu2.8
All of the following
azurelinux/curl<8.11.1-13
8.11.1-13
Microsoft Azure Linux=3.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade alpine/curl to a version that resolves this vulnerability.

    Fixed in 8.23.0-r0
  2. Upgrade

    Upgrade debian/curl to a version that resolves this vulnerability.

    Fixed in 7.88.1-10+deb12u15Fixed in 7.88.1-10+deb12u5Fixed in 8.23.0-1
  3. Upgrade

    Upgrade ubuntu/curl to a version that resolves this vulnerability.

    Fixed in 7.81.0-1ubuntu1.30
  4. Upgrade

    Upgrade ubuntu/curl to a version that resolves this vulnerability.

    Fixed in 8.5.0-2ubuntu10.16
  5. Upgrade

    Upgrade ubuntu/curl to a version that resolves this vulnerability.

    Fixed in 8.20.0-2ubuntu11.1
  6. Upgrade

    Upgrade ubuntu/curl to a version that resolves this vulnerability.

    Fixed in 8.18.0-1ubuntu2.8
  7. Upgrade

    Upgrade azurelinux/curl to a version that resolves this vulnerability.

    Fixed in 8.11.1-13

Event History

Oct 14, 2026
CVE Published
via OSV·06:00 AM
Data Sourced
via OSV·06:00 AM
DescriptionSeverityAffected Software
Oct 20, 2026
CVE Published
via MITRE·08:10 PM
Data Sourced
via MITRE·08:10 PM
DescriptionWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeakness
Oct 23, 2026
Data Sourced
via Microsoft·08:07 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·08:07 AM
Affected Software

Company

Resources

Contact

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