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4 vulnerabilities by @fastify/reply-from
CVE-2026-16158 (GCVE-0-2026-16158)
Vulnerability from nvd – Published: 2026-07-18 12:28 – Updated: 2026-07-18 12:28
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)
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) |
Credits
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CVE-2026-33805 (GCVE-0-2026-33805)
Vulnerability from nvd – Published: 2026-04-15 10:13 – Updated: 2026-07-15 01:06
VLAI
EPSS
VEX
Title
@fastify/reply-from vulnerable to connection header abuse enabling stripping of proxy-added headers
Summary
@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them in the Connection header value. Any header added by the proxy for routing, access control, or security purposes can be selectively removed by a client. @fastify/http-proxy is also affected as it delegates to @fastify/reply-from.
Upgrade to @fastify/reply-from v12.6.2 or @fastify/http-proxy v11.4.4 or later.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/fastify/fastify-reply-from/sec… | |
| https://cna.openjsf.org/security-advisories.html | |
| https://access.redhat.com/security/cve/CVE-2026-33805 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458651 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:10175 | vendor-advisoryx_refsource_REDHAT |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Affected:
0 , < 12.6.2
(semver)
Unaffected: 12.6.2 (semver) |
|
| @fastify/reply-from | @fastify/http-proxy |
Affected:
0 , < 11.4.4
(semver)
Unaffected: 11.4.4 (semver) |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.27 |
Unaffected:
1776795511 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.27::el9 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
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CVE-2026-16158 (GCVE-0-2026-16158)
Vulnerability from cvelistv5 – Published: 2026-07-18 12:28 – Updated: 2026-07-18 12:28
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)
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-2026-33805 (GCVE-0-2026-33805)
Vulnerability from cvelistv5 – Published: 2026-04-15 10:13 – Updated: 2026-07-15 01:06
VLAI
EPSS
VEX
Title
@fastify/reply-from vulnerable to connection header abuse enabling stripping of proxy-added headers
Summary
@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them in the Connection header value. Any header added by the proxy for routing, access control, or security purposes can be selectively removed by a client. @fastify/http-proxy is also affected as it delegates to @fastify/reply-from.
Upgrade to @fastify/reply-from v12.6.2 or @fastify/http-proxy v11.4.4 or later.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/fastify/fastify-reply-from/sec… | |
| https://cna.openjsf.org/security-advisories.html | |
| https://access.redhat.com/security/cve/CVE-2026-33805 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458651 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:10175 | vendor-advisoryx_refsource_REDHAT |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Affected:
0 , < 12.6.2
(semver)
Unaffected: 12.6.2 (semver) |
|
| @fastify/reply-from | @fastify/http-proxy |
Affected:
0 , < 11.4.4
(semver)
Unaffected: 11.4.4 (semver) |
|
| Red Hat | Red Hat OpenShift Dev Spaces 3.27 |
Unaffected:
1776795511 , < *
(rpm)
cpe:/a:redhat:openshift_devspaces:3.27::el9 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
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