CVE-2026-93750
Medium
Description
http-cache-semantics through 4.2.0 contains a cache validation vulnerability in the _varyMatches() function that fails to properly validate Vary header wildcards due to byte-for-byte string comparison. Attackers can request URLs previously fetched by other clients to receive cached responses intended for different users, disclosing sensitive information across clients.
SeverityMedium
CVSS5.9
Exploit probability—
ProductKornelski Http-cache-semantics
PublishedSep 18, 2026
First seenSep 18, 2026
Weakness typeCWE-436CWE-436
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kornelski http-cache-semantics | v ≤ 4.2.0 | — |
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