CVE-2026-31818 (GCVE-0-2026-31818)
Vulnerability from cvelistv5 – Published: 2026-04-03 15:41 – Updated: 2026-04-03 20:04
VLAI?
Title
Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist
Summary
Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase's REST datasource connector. The platform's SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4.
Severity ?
9.6 (Critical)
CWE
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-31818",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-03T20:04:22.287596Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-03T20:04:33.012Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "budibase",
"vendor": "Budibase",
"versions": [
{
"status": "affected",
"version": "\u003c 3.33.4"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase\u0027s REST datasource connector. The platform\u0027s SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.6,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1188",
"description": "CWE-1188: Insecure Default Initialization of Resource",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-03T15:41:13.955Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45"
},
{
"name": "https://github.com/Budibase/budibase/pull/18236",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Budibase/budibase/pull/18236"
},
{
"name": "https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732"
},
{
"name": "https://github.com/Budibase/budibase/releases/tag/3.33.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Budibase/budibase/releases/tag/3.33.4"
}
],
"source": {
"advisory": "GHSA-7r9j-r86q-7g45",
"discovery": "UNKNOWN"
},
"title": "Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-31818",
"datePublished": "2026-04-03T15:41:13.955Z",
"dateReserved": "2026-03-09T17:41:56.076Z",
"dateUpdated": "2026-04-03T20:04:33.012Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-31818\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-04-03T16:16:39.800\",\"lastModified\":\"2026-04-03T16:16:39.800\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase\u0027s REST datasource connector. The platform\u0027s SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N\",\"baseScore\":9.6,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.1,\"impactScore\":5.8}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"},{\"lang\":\"en\",\"value\":\"CWE-1188\"}]}],\"references\":[{\"url\":\"https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/Budibase/budibase/pull/18236\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/Budibase/budibase/releases/tag/3.33.4\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45\",\"source\":\"security-advisories@github.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-31818\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-03T20:04:22.287596Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-03T20:04:28.809Z\"}}], \"cna\": {\"title\": \"Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist\", \"source\": {\"advisory\": \"GHSA-7r9j-r86q-7g45\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 9.6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"Budibase\", \"product\": \"budibase\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 3.33.4\"}]}], \"references\": [{\"url\": \"https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45\", \"name\": \"https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/Budibase/budibase/pull/18236\", \"name\": \"https://github.com/Budibase/budibase/pull/18236\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732\", \"name\": \"https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/Budibase/budibase/releases/tag/3.33.4\", \"name\": \"https://github.com/Budibase/budibase/releases/tag/3.33.4\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Budibase is an open-source low-code platform. Prior to version 3.33.4, a server-side request forgery (SSRF) vulnerability exists in Budibase\u0027s REST datasource connector. The platform\u0027s SSRF protection mechanism (IP blacklist) is rendered completely ineffective because the BLACKLIST_IPS environment variable is not set by default in any of the official deployment configurations. When this variable is empty, the blacklist function unconditionally returns false, allowing all requests through without restriction. This issue has been patched in version 3.33.4.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-918\", \"description\": \"CWE-918: Server-Side Request Forgery (SSRF)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1188\", \"description\": \"CWE-1188: Insecure Default Initialization of Resource\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-04-03T15:41:13.955Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-31818\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-03T20:04:33.012Z\", \"dateReserved\": \"2026-03-09T17:41:56.076Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-04-03T15:41:13.955Z\", \"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…