CVE-2026-40168 (GCVE-0-2026-40168)
Vulnerability from cvelistv5 – Published: 2026-04-10 19:20 – Updated: 2026-04-13 20:55
VLAI?
Title
Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream
Summary
Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.
Severity ?
8.2 (High)
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| gitroomhq | postiz-app |
Affected:
< 2.21.5
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-40168",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-13T20:55:02.053732Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-13T20:55:15.792Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "postiz-app",
"vendor": "gitroomhq",
"versions": [
{
"status": "affected",
"version": "\u003c 2.21.5"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-10T19:20:16.365Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww"
},
{
"name": "https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06"
},
{
"name": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5"
}
],
"source": {
"advisory": "GHSA-34w8-5j2v-h6ww",
"discovery": "UNKNOWN"
},
"title": "Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-40168",
"datePublished": "2026-04-10T19:20:16.365Z",
"dateReserved": "2026-04-09T19:31:56.014Z",
"dateUpdated": "2026-04-13T20:55:15.792Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-40168",
"date": "2026-04-15",
"epss": "0.00042",
"percentile": "0.12818"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-40168\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-04-10T20:16:22.643\",\"lastModified\":\"2026-04-14T20:09:03.727\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gitroom:postiz:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"2.21.5\",\"matchCriteriaId\":\"F8244F9F-08C4-4279-883D-470D3C7145F8\"}]}]}],\"references\":[{\"url\":\"https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Product\",\"Release Notes\"]},{\"url\":\"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Exploit\",\"Mitigation\",\"Vendor Advisory\"]}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-40168\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-13T20:55:02.053732Z\"}}}], \"references\": [{\"url\": \"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-13T20:55:11.223Z\"}}], \"cna\": {\"title\": \"Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream\", \"source\": {\"advisory\": \"GHSA-34w8-5j2v-h6ww\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"gitroomhq\", \"product\": \"postiz-app\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 2.21.5\"}]}], \"references\": [{\"url\": \"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww\", \"name\": \"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06\", \"name\": \"https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5\", \"name\": \"https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-918\", \"description\": \"CWE-918: Server-Side Request Forgery (SSRF)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-04-10T19:20:16.365Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-40168\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-13T20:55:15.792Z\", \"dateReserved\": \"2026-04-09T19:31:56.014Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-04-10T19:20:16.365Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…