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Vulnerabilities

Vulnerability · CVE-2026-93748

http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale

Published Sep 18, 2026 · catalog updated Oct 14, 2026 · http-cache-semantics through 4.2.0 Cross-User

Check if you run it

No confirmed exploitation is on record for CVE-2026-93748. EPSS is 0.57%. Act only if a listed version of http-cache-semantics through 4.2.0 Cross-User is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (http-cache-semantics through 4.2.0 Cross-User).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.57%
Remediation
Not established
Affected products
vendor kornelski http-cache-semantics

http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor kornelski http-cache-semanticsversion unspecified

How to fix CVE-2026-93748

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-93748. EPSS is 0.57%. Act only if a listed version of http-cache-semantics through 4.2.0 Cross-User is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-524. EPSS 0.57%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 18, 2026 · NIST NVD

    Detected

    http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zero

  2. Oct 14, 2026 · NIST NVD

    Updated

    http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zero

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2026-93748

    http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-s

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-93748

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-93748

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-2026-93748

    http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-s

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.