175 lines
7.5 KiB
JSON
175 lines
7.5 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-55430",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-06-16T21:59:57.017Z",
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"datePublished": "2026-07-08T00:03:29.728Z",
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"dateUpdated": "2026-07-08T17:10:40.949Z"
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},
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"containers": {
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"cna": {
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"title": "Coder's subdomain workspace app routing trusts unauthenticated X-Forwarded-Host header, enabling cross-app data access",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-345",
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"lang": "en",
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"description": "CWE-345: Insufficient Verification of Data Authenticity",
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"type": "CWE"
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}
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]
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},
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{
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"descriptions": [
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{
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"cweId": "CWE-441",
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"lang": "en",
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"description": "CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 5.8,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "NONE",
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"privilegesRequired": "LOW",
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"scope": "CHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/coder/coder/security/advisories/GHSA-5g4w-3vw9-478w",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/coder/coder/security/advisories/GHSA-5g4w-3vw9-478w"
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},
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{
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"name": "https://github.com/coder/coder/pull/26204",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/coder/coder/pull/26204"
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},
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{
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"name": "https://github.com/coder/coder/releases/tag/v2.29.17",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/coder/coder/releases/tag/v2.29.17"
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},
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{
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"name": "https://github.com/coder/coder/releases/tag/v2.32.7",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/coder/coder/releases/tag/v2.32.7"
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},
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{
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"name": "https://github.com/coder/coder/releases/tag/v2.33.8",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/coder/coder/releases/tag/v2.33.8"
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},
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{
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"name": "https://github.com/coder/coder/releases/tag/v2.34.2",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/coder/coder/releases/tag/v2.34.2"
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}
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],
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"affected": [
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{
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"vendor": "coder",
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"product": "coder",
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"versions": [
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{
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"version": ">= 2.34.0, < 2.34.2",
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"status": "affected"
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},
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{
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"version": ">= 2.33.0, < 2.33.8",
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"status": "affected"
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},
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{
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"version": ">= 2.30.0, < 2.32.7",
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"status": "affected"
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},
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{
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"version": "< 2.29.17",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-07-08T00:03:29.728Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "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 (wildcard hostname) enabled, a victim who visits the attacker's shared app and a deployment whose upstream proxy does not strip `X-Forwarded-Host`. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 trusts `X-Forwarded-Host` only from configured trusted proxies and otherwise resolves the routing host from the verified request host. As a workaround, place an upstream reverse proxy that strips or overwrites `X-Forwarded-Host` on untrusted requests."
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}
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],
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"source": {
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"advisory": "GHSA-5g4w-3vw9-478w",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-08T16:57:10.249359Z",
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"id": "CVE-2026-55430",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-07-08T17:10:40.949Z"
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}
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}
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]
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}
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} |