Is CVE-2026-56280 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-56280 being exploited in the wild.

How severe is CVE-2026-56280?

High severity, with a CVSS score of 7.1, published 22 June 2026.

Is there a fix for CVE-2026-56280?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-56280 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-56280?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-56280: Cap-go privilege inversion in build log stream via SSE disconnect

CVE-2026-56280 · Severity: high · CVSS 7.1 · Published 2026-06-22

Cap-go is a service used for managing and deploying mobile app updates. A security flaw allows users with restricted, read-only access to prematurely cancel active app builds by simply disconnecting from a log stream. This can be used by malicious insiders or compromised accounts to disrupt development workflows and prevent teams from successfully building or deploying their software.

Quick answers

Is CVE-2026-56280 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-56280 being exploited in the wild.
How severe is CVE-2026-56280?: High severity, with a CVSS score of 7.1, published 22 June 2026.
Which products and versions are affected?: Cap-go capgo < 12.128.2.
Is there a fix for CVE-2026-56280?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-56280 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-56280?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A privilege inversion vulnerability exists in the 'GET /build/logs/:jobId' endpoint of Cap-go. While the endpoint itself is restricted to 'app.read_logs' permissions, it registers an abort listener on the Server-Sent Events (SSE) stream that unconditionally triggers 'cancelBuildOnDisconnect()'. This function executes the cancellation using a privileged server-side 'BUILDER_API_KEY', bypassing the 'app.build_native' write permission check enforced on the standard cancellation endpoint. An attacker with a valid read-only API key can disrupt CI/CD workflows by initiating a log stream and abruptly dropping the TCP connection, causing the server to terminate the associated build job. This issue is resolved in version 12.128.2.

Affected products

Cap-go capgo < 12.128.2

Timeline

2026-05-07: advisory: GitHub Security Advisory GHSA-95g7-xwwx-j737 published
2026-06-22: disclosed: CVE-2026-56280 published to NVD

References

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