# CVE-2026-93748: http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale

> CVE-2026-93748: http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-93748
Last updated: 2026-10-14T23:19:08Z

- Published: 2026-09-18 17:51 UTC · Updated: 2026-10-14 23:19 UTC · Assigner: VulnCheck
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS: 0.57%, 47th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-524

## Description

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.

## Affected vendors and products

- kornelski: http-cache-semantics

## Tracked companies

- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-93748)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-93748)
- [https://github.com/kornelski/http-cache-semantics](https://github.com/kornelski/http-cache-semantics)
- [https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js\#L425-L441](https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L425-L441)
- [https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js\#L603-L623](https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L603-L623)
- [https://github.com/kornelski/http-cache-semantics/issues/56](https://github.com/kornelski/http-cache-semantics/issues/56)
- [https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale](https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-93748 · Markdown: https://rewindex.com/cve/CVE-2026-93748.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-93748 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:16.780Z