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CVE-2026-55430

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, the workspace app proxy resolves the target app from `httpapi.RequestHost()` which prefers the `X-Forwarded-Host` header over the real `Host` header. No middleware strips `X-Forwarded-Host` before routing and the header is not browser-forbidden so client-side JavaScript can set it on `fetch()` calls. Practical exploitation requires subdomain app routing (wi
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d5fb7dc206e125637f16dfb92dbb68118a36d4d5df32fa0dd5f91ee448037240
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-441","description":"CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"coder","vendor":"coder","versions":[{"status":"affected","version":">= 2.34.0, < 2.34.2"},{"status":"affected","version":">= 2.33.0, < 2.33.8"},{"status":"affected","version":">= 2.30.0, < 2.32.7"},{"status":"affected","version":"< 2.29.17"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-441","description":"CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"https://github.com/coder/coder/pull/26204","tags":["x_refsource_MISC"],"url":"https://github.com/coder/coder/pull/26204"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/references/1
{"name":"https://github.com/coder/coder/releases/tag/v2.29.17","tags":["x_refsource_MISC"],"url":"https://github.com/coder/coder/releases/tag/v2.29.17"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/references/2
{"name":"https://github.com/coder/coder/releases/tag/v2.32.7","tags":["x_refsource_MISC"],"url":"https://github.com/coder/coder/releases/tag/v2.32.7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/references/3
{"name":"https://github.com/coder/coder/releases/tag/v2.33.8","tags":["x_refsource_MISC"],"url":"https://github.com/coder/coder/releases/tag/v2.33.8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/references/4
{"name":"https://github.com/coder/coder/releases/tag/v2.34.2","tags":["x_refsource_MISC"],"url":"https://github.com/coder/coder/releases/tag/v2.34.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/references/5
{"name":"https://github.com/coder/coder/security/advisories/GHSA-5g4w-3vw9-478w","tags":["x_refsource_CONFIRM"],"url":"https://github.com/coder/coder/security/advisories/GHSA-5g4w-3vw9-478w"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de1f1b7e9e822eef512dbbc4683824af016b66478110466c15395dcab2d4658d · sha256:7bf003dfc5807e65… · /containers/cna/references/0

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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