CVE-2026-50136

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 79% 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 week
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: 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 3.39.3, the application server exposes an unauthenticated endpoint that generates S3 PutObject presigned URLs using credentials stored in a workspace datasource. The route is protected only by the recaptcha middleware and does not require authentication, table permission, datasource permission, or builder access. A public caller who knows a workspace ID and S3 datasource ID can request a signed upload URL for attacker-controlled bucket and key values. This vulnerability is fixed in 3.39.3.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
20.8%
KEV
Not listed

Published

June 22, 2026

Last Modified

June 30, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unauthenticated S3 signed upload URL generation allows arbitrary writes with stored datasource credentials · Advisory · Budibase/budibase · GitHub

https://github.com/Budibase/budibase/security/advisories/GHSA-jj36-r9w3-3pfh

Vendor Advisories for CVE-2026-50136(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@budibase/server—3.39.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 35× 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.

  1. 2026-07-06 17:01 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-05 14:48 UTCEG score recompute
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-04 12:23 UTCEG score recompute
  7. 2026-07-03 10:11 UTCEG score recompute
  8. 2026-07-02 07:58 UTCEG score recompute
  9. 2026-07-01 15:07 UTCEPSS rescore
  10. 2026-07-01 05:45 UTCEG score recompute▼ 2.10
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 20:33 UTCNVD updateCVSS v3 → 5.3 · severity → MEDIUM
  13. 2026-06-30 18:43 UTCEG score recompute
  14. 2026-06-30 07:43 UTCEG score recompute
  15. 2026-06-29 20:43 UTCEG score recompute
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 09:43 UTCEG score recompute
  19. 2026-06-28 22:44 UTCEG score recompute
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 11:44 UTCEG score recompute
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 00:45 UTCEG score recompute
  25. 2026-06-27 13:45 UTCEG score recompute
Show 10 more
  1. 2026-06-27 02:46 UTCEG score recompute
  2. 2026-06-26 15:46 UTCEG score recompute
  3. 2026-06-26 04:39 UTCEG score recompute
  4. 2026-06-25 17:38 UTCEG score recompute
  5. 2026-06-25 06:38 UTCEG score recompute
  6. 2026-06-24 19:35 UTCEG score recompute
  7. 2026-06-24 08:35 UTCEG score recompute
  8. 2026-06-23 21:36 UTCEG score recompute
  9. 2026-06-23 10:34 UTCEG score recompute
  10. 2026-06-22 23:30 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-50136?
CVE-2026-50136 is a medium vulnerability published on June 22, 2026. Budibase is an open-source low-code platform. Prior to 3.39.3, the application server exposes an unauthenticated endpoint that generates S3 PutObject presigned URLs using credentials stored in a workspace datasource. The route is protected only by the recaptcha middleware and does not require…
When was CVE-2026-50136 disclosed?
CVE-2026-50136 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50136 actively exploited?
CVE-2026-50136 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-50136?
CVE-2026-50136 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-50136?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50136, 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.

Dependency Blast Radius

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