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PatchSiren cyber security CVE debrief

CVE-2026-56250 Capgo CVE debrief

CVE-2026-56250 is a high-severity vulnerability in Capgo, a platform that allows upload-scoped API keys to modify the mutable app_versions.r2_path field through PostgREST. This enables retargeting to arbitrary R2 bundle objects, potentially causing denial of service and bundle availability disruption. The vulnerability has a CVSS score of 8.7 and is considered High severity. Users of Capgo versions before 12.128.2 should be aware of this vulnerability and take immediate action to update to the latest version.

Vendor
Capgo
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-08
Original CVE updated
2026-07-08
Advisory published
2026-07-08
Advisory updated
2026-07-08

Who should care

Users of Capgo versions before 12.128.2, particularly those with administrative access, should be aware of this vulnerability and take immediate action to update to the latest version. Additionally, security teams and vulnerability management teams should review the affected scope and severity to determine the necessary course of action.

Technical summary

The vulnerability exists in Capgo, a platform that allows upload-scoped API keys to modify the mutable app_versions.r2_path field through PostgREST. This enables retargeting to arbitrary R2 bundle objects. Attackers can patch r2_path to point to victim objects, soft-delete the attacker-controlled version, and trigger the on_version_update cleanup function to delete the victim R2 object, causing denial of service and bundle availability disruption. The vulnerability has a CVSS score of 8.7 and is considered High severity.

Defensive priority

High

Recommended defensive actions

  • Update Capgo to version 12.128.2 or later
  • Review and restrict API key permissions
  • Monitor for suspicious activity
  • Implement additional security measures to prevent similar attacks
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-08T14:17:15.673Z and has not been modified since then. The NVD entry is currently Deferred. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The vulnerability exists in Capgo, a platform that allows upload-scoped API keys to modify the mutable app_versions.r2_path field through PostgREST.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-56250 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-56250

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-56250 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56250

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.