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CVE-2026-33805

@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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3226793fb30af3786173f023fa769c115b09afc9c54ef13d1a12d00487e53e54
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 8 assertions

{"defaultStatus":"unaffected","packageURL":"pkg:npm/@fastify/http-proxy","product":"@fastify/http-proxy","vendor":"@fastify/reply-from","versions":[{"lessThan":"11.4.4","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"11.4.4","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/affected/1

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.27::el9"],"defaultStatus":"affected","packageName":"devspaces/dashboard-rhel9","product":"Red Hat OpenShift Dev Spaces 3.27","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1776795511","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-mod-arch-maas-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/4

{"defaultStatus":"unaffected","packageURL":"pkg:npm/@fastify/reply-from","product":"@fastify/reply-from","vendor":"@fastify/reply-from","versions":[{"lessThan":"12.6.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"12.6.2","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-mod-arch-gen-ai-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-mod-arch-model-registry-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"unaffected","packageName":"rhoai/odh-dashboard-rhel8","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-dashboard-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/2
cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/metrics/1/cvssV3_1

{"metric":{"baseScore":9,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-444","description":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/problemTypes/0/descriptions/0

{"cweId":"CWE-644","description":"CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

8 source assertions
{"defaultStatus":"unaffected","packageURL":"pkg:npm/@fastify/http-proxy","product":"@fastify/http-proxy","vendor":"@fastify/reply-from","versions":[{"lessThan":"11.4.4","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"11.4.4","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/affected/1
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.27::el9"],"defaultStatus":"affected","packageName":"devspaces/dashboard-rhel9","product":"Red Hat OpenShift Dev Spaces 3.27","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1776795511","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-mod-arch-maas-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/4
{"defaultStatus":"unaffected","packageURL":"pkg:npm/@fastify/reply-from","product":"@fastify/reply-from","vendor":"@fastify/reply-from","versions":[{"lessThan":"12.6.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"12.6.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-mod-arch-gen-ai-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-mod-arch-model-registry-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"unaffected","packageName":"rhoai/odh-dashboard-rhel8","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","packageName":"rhoai/odh-dashboard-rhel9","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/affected/2

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"baseScore":9,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-444","description":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/problemTypes/0/descriptions/0
{"cweId":"CWE-644","description":"CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:10175"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-33805"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/references/0
{"name":"RHBZ#2458651","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458651"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/references/1
{"url":"https://cna.openjsf.org/security-advisories.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/references/1
{"url":"https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-gwhp-pf74-vj37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-gwhp-pf74-vj37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/0/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33805.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7f592f0a4c03820892e280f9f8b58d26b4de32fcd59345750338c3ec06b02d66 · sha256:294755384317aaae… · /containers/adp/1/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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