Description
A flaw was found in curl. When persistent HTTP Strict Transport Security (HSTS) caching is enabled, a remote HTTPS server can return an out-of-range expiration value that fails time serialization during cache saving. Because curl truncates the cache file prior to writing the update, this serialization failure causes the persistent HSTS cache to be deleted or emptied. As a result, stored security policies for known hosts are lost, potentially allowing future connections to fall back to insecure communication.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
No data.
No data.
No data available yet.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
Advisories
| Source | ID | Title |
|---|---|---|
 Ubuntu USN |
USN-8927-1 | curl vulnerabilities |
| Ubuntu USN |
USN-8932-1 | curl vulnerabilities |
References
History
Sat, 17 Oct 2026 00:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in curl. When persistent HTTP Strict Transport Security (HSTS) caching is enabled, a remote HTTPS server can return an out-of-range expiration value that fails time serialization during cache saving. Because curl truncates the cache file prior to writing the update, this serialization failure causes the persistent HSTS cache to be deleted or emptied. As a result, stored security policies for known hosts are lost, potentially allowing future connections to fall back to insecure communication. | |
| Title | curl: curl: Hsts Response Erases Persisted Entries | |
| Weaknesses | CWE-201 | |
| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|
Subscriptions
No data.
MITRE
No data.
Vulnrichment
No data.
NVD
No data.
Redhat
OpenCVE Enrichment
Updated: 2026-10-17T02:45:13Z
Weaknesses