CVE-2026-31818

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
59(Track*)
EG Risk 59/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity96% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
30.2%
KEV
Not listed

Published

April 3, 2026

Last Modified

April 8, 2026

Advisory Details (4)

Auto-updated May 20, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Server-Side Request Forgery via REST Connector with Empty Default Blacklist · Advisory · Budibase/budibase · GitHub

Affected: v2.4.3) —

https://github.com/Budibase/budibase/security/advisories/GHSA-7r9j-r86q-7g45
generic

Release 3.33.4 · Budibase/budibase · GitHub

https://github.com/Budibase/budibase/releases/tag/3.33.4
generic

fix: block internal REST targets by default by melohagan · Pull Request #18236 · Budibase/budibase · GitHub

https://github.com/Budibase/budibase/pull/18236
generic

Merge pull request #18236 from Budibase/fix/ssrf-rest · Budibase/budibase@5b0fe83 · GitHub

https://github.com/Budibase/budibase/commit/5b0fe83d4ece52696b62589cba89ef50cc009732

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@budibase/backend-core—3.33.4—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 109 total refreshes for this CVE.

  1. 2026-07-23 03:08 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-22 14:08 UTCEPSS rescore
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  13. 2026-07-17 19:29 UTCOSV refresh
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  74. 2026-05-24 16:59 UTCEPSS rescore
  75. 2026-05-23 15:21 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-31818?
CVE-2026-31818 is a critical vulnerability published on April 3, 2026. 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…
When was CVE-2026-31818 disclosed?
CVE-2026-31818 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on April 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31818 actively exploited?
CVE-2026-31818 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31818?
CVE-2026-31818 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-31818?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31818, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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