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4 vulnerabilities by kornelski
CVE-2026-93750 (GCVE-0-2026-93750)
Vulnerability from nvd – Published: 2026-09-18 17:51 – Updated: 2026-09-18 18:03
VLAI
EPSS
VEX
Title
http-cache-semantics through 4.2.0 Cross-Client Cache Disclosure via Vary Wildcard
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 18:03 UTC
CWE
- CWE-436 - Interpretation Conflict
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/kornelski/http-cache-semantics… | issue-tracking |
| https://github.com/kornelski/http-cache-semantics | product |
| https://github.com/kornelski/http-cache-semantics… | technical-description |
| https://www.vulncheck.com/advisories/http-cache-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| kornelski | http-cache-semantics |
Affected:
0 , ≤ 4.2.0
(semver)
cpe:2.3:a:http-cache-semantics_project:http-cache-semantics:*:*:*:*:*:*:*:* |
Date Public
2026-09-17 00:00
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CVE-2026-93748 (GCVE-0-2026-93748)
Vulnerability from nvd – Published: 2026-09-18 17:51 – Updated: 2026-09-18 20:05
VLAI
EPSS
VEX
Title
http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 20:05 UTC
CWE
- CWE-524 - Use of Cache Containing Sensitive Information
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/kornelski/http-cache-semantics… | issue-tracking |
| https://github.com/kornelski/http-cache-semantics | product |
| https://github.com/kornelski/http-cache-semantics… | technical-description |
| https://github.com/kornelski/http-cache-semantics… | technical-description |
| https://www.vulncheck.com/advisories/http-cache-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| kornelski | http-cache-semantics |
Affected:
0 , ≤ 4.2.0
(semver)
cpe:2.3:a:http-cache-semantics_project:http-cache-semantics:*:*:*:*:*:*:*:* |
Date Public
2026-09-17 00:00
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CVE-2026-93750 (GCVE-0-2026-93750)
Vulnerability from cvelistv5 – Published: 2026-09-18 17:51 – Updated: 2026-09-18 18:03
VLAI
EPSS
VEX
Title
http-cache-semantics through 4.2.0 Cross-Client Cache Disclosure via Vary Wildcard
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 18:03 UTC
CWE
- CWE-436 - Interpretation Conflict
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/kornelski/http-cache-semantics… | issue-tracking |
| https://github.com/kornelski/http-cache-semantics | product |
| https://github.com/kornelski/http-cache-semantics… | technical-description |
| https://www.vulncheck.com/advisories/http-cache-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| kornelski | http-cache-semantics |
Affected:
0 , ≤ 4.2.0
(semver)
cpe:2.3:a:http-cache-semantics_project:http-cache-semantics:*:*:*:*:*:*:*:* |
Date Public
2026-09-17 00:00
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CVE-2026-93748 (GCVE-0-2026-93748)
Vulnerability from cvelistv5 – Published: 2026-09-18 17:51 – Updated: 2026-09-18 20:05
VLAI
EPSS
VEX
Title
http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 20:05 UTC
CWE
- CWE-524 - Use of Cache Containing Sensitive Information
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/kornelski/http-cache-semantics… | issue-tracking |
| https://github.com/kornelski/http-cache-semantics | product |
| https://github.com/kornelski/http-cache-semantics… | technical-description |
| https://github.com/kornelski/http-cache-semantics… | technical-description |
| https://www.vulncheck.com/advisories/http-cache-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| kornelski | http-cache-semantics |
Affected:
0 , ≤ 4.2.0
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cpe:2.3:a:http-cache-semantics_project:http-cache-semantics:*:*:*:*:*:*:*:* |
Date Public
2026-09-17 00:00
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