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2 vulnerabilities found for fastify\/reply-from by fastify
CVE-2026-16158 (GCVE-0-2026-16158)
Vulnerability from nvd – Published: 2026-07-18 12:28 – Updated: 2026-07-20 15:15
VLAI
EPSS
VEX
Title
@fastify/reply-from vulnerable to cross-upstream request routing via URL cache key collision
Summary
Impact: @fastify/reply-from versions from 8.3.1 up to but not including 12.6.4 build the internal URL cache key by concatenating the destination and source path without a delimiter. Different destination and source pairs can therefore produce the same key while resolving to different upstream URLs. When getUpstream selects an upstream from request data, a URL cached for one upstream can be reused for a request intended for another upstream, causing cross-upstream data access and modification. The default configuration is affected. Setting disableCache to true prevents the behavior. Patches: upgrade to @fastify/reply-from 12.6.4. Workarounds: pass disableCache: true when registering the plugin.
Severity
8.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 15:15 UTC
CWE
- CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Affected:
8.3.1 , < 12.6.4
(semver)
Unaffected: 12.6.4 (semver) |
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CVE-2026-16158 (GCVE-0-2026-16158)
Vulnerability from cvelistv5 – Published: 2026-07-18 12:28 – Updated: 2026-07-20 15:15
VLAI
EPSS
VEX
Title
@fastify/reply-from vulnerable to cross-upstream request routing via URL cache key collision
Summary
Impact: @fastify/reply-from versions from 8.3.1 up to but not including 12.6.4 build the internal URL cache key by concatenating the destination and source path without a delimiter. Different destination and source pairs can therefore produce the same key while resolving to different upstream URLs. When getUpstream selects an upstream from request data, a URL cached for one upstream can be reused for a request intended for another upstream, causing cross-upstream data access and modification. The default configuration is affected. Setting disableCache to true prevents the behavior. Patches: upgrade to @fastify/reply-from 12.6.4. Workarounds: pass disableCache: true when registering the plugin.
Severity
8.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 15:15 UTC
CWE
- CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Affected:
8.3.1 , < 12.6.4
(semver)
Unaffected: 12.6.4 (semver) |
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