CVE-2026-93748 http-cache-semantics - Information Disclosure

http-cache-semantics <= 4.2.0 contains an information disclosure vulnerability caused by improper validation of security-zeroed cache entries when processing client max-stale directives, letting unauthenticated attackers retrieve cached responses of other users, exploit requires attacker to send requests with large max-stale values.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.57% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-524

Vendor fix

Update to a version later than 4.2.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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