CVE-2026-56337

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 82% 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, secondary
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.

Capgo before 12.128.2 contains an information disclosure vulnerability in the public.exist_app_v2 RPC function that allows unauthenticated attackers to enumerate app_ids by calling POST /rest/v1/rpc/exist_app_v2 with arbitrary appid parameters. Remote attackers can exploit this SECURITY DEFINER function to determine whether specific app_ids exist in the public.apps table, enabling cross-tenant app enumeration and privacy violations.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
17.6%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 25, 2026

Advisory Details (2)

Auto-updated Jun 27, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unauthenticated Supabase RPC exist_app_v2(appid) (SECURITY DEFINER) bypasses RLS and reveals whether an app_id exists · Advisory · Cap-go/capgo · GitHub

https://github.com/Cap-go/capgo/security/advisories/GHSA-wjqr-gmx8-jj56
generic

Capgo - Information Disclosure via Unauthenticated RPC Function exist_app_v2 | Advisories | VulnCheck

https://www.vulncheck.com/advisories/capgo-information-disclosure-via-unauthenticated-rpc-function-exist-app-v2

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 52× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-15 00:58 UTCEG score recompute
  6. 2026-07-13 23:09 UTCEG score recompute
  7. 2026-07-13 22:31 UTCEPSS rescore
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-13 06:13 UTCEPSS rescore
  10. 2026-07-12 21:21 UTCEG score recompute
  11. 2026-07-12 05:46 UTCEPSS rescore
  12. 2026-07-11 19:21 UTCEG score recompute
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-10 17:32 UTCEG score recompute
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-09 15:43 UTCEG score recompute
  19. 2026-07-08 15:16 UTCEPSS rescore
  20. 2026-07-08 15:16 UTCEPSS rescore
  21. 2026-07-08 13:54 UTCEG score recompute
  22. 2026-07-07 13:46 UTCEPSS rescore
  23. 2026-07-07 13:46 UTCEPSS rescore
  24. 2026-07-07 12:06 UTCEG score recompute
  25. 2026-07-06 16:27 UTCEPSS rescore
Show 27 more
  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 10:17 UTCEG score recompute
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 08:21 UTCEG score recompute
  6. 2026-07-05 02:31 UTCEPSS rescore
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 06:32 UTCEG score recompute
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 04:32 UTCEG score recompute
  12. 2026-07-02 02:40 UTCEG score recompute
  13. 2026-07-01 15:07 UTCEPSS rescore
  14. 2026-07-01 00:52 UTCEG score recompute
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-29 23:04 UTCEG score recompute
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-28 21:13 UTCEG score recompute
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-27 19:25 UTCEG score recompute
  24. 2026-06-27 03:08 UTCEPSS rescore
  25. 2026-06-26 17:36 UTCEG score recompute
  26. 2026-06-25 15:48 UTCEG score recompute
  27. 2026-06-25 15:47 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56337?
CVE-2026-56337 is a medium vulnerability published on June 24, 2026. Capgo before 12.128.2 contains an information disclosure vulnerability in the public.existappv2 RPC function that allows unauthenticated attackers to enumerate appids by calling POST /rest/v1/rpc/existappv2 with arbitrary appid parameters. Remote attackers can exploit this SECURITY DEFINER function…
When was CVE-2026-56337 disclosed?
CVE-2026-56337 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56337 actively exploited?
CVE-2026-56337 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56337?
CVE-2026-56337 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-56337?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56337, 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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