CVE-2026-56213Public exploitNetwork attack vector

Unauthenticated metrics poisoning via unchecked RPC writes

Published Jun 20, 2026 · Updated Jun 20, 2026

Missing authorization in Capgo before 12.128.2 allows remote attackers to poison cross-tenant storage metrics via a public RPC. The public.upsert_version_meta SECURITY DEFINER function accepts attacker-controlled app, version, and size values from the anon role and inserts them into version_meta without ownership checks, bypassing row-level security. Possession of a public anonymous key is sufficient, and injected rows persist through aggregation into dashboards, analytics, and false alerts.

CVSS severity6.9
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Capgo before 12.128.2 allows remote attackers to poison cross-tenant storage metrics via a public RPC. The public.upsert_version_meta SECURITY DEFINER function accepts attacker-controlled app, version, and size values from the anon role and inserts them into version_meta without ownership checks, bypassing row-level security. Possession of a public anonymous key is sufficient, and injected rows persist through aggregation into dashboards, analytics, and false alerts.

The record

CVE
CVE-2026-56213
Published
Jun 20, 2026
Updated
Jun 20, 2026
Vendor
Capgo
Product
Capgo
Classifications
CWE-862, T1190, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <12.128.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Capgo · Capgoversion=0 <12.128.2

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
5.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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