# CVE-2026-56307 — Cap-go capgo

> As of 2026-06-20, CVE-2026-56307 is a MEDIUM-severity vulnerability in Cap-go capgo, CVSS v3.1 4.3. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-56307 as of 2026-06-20; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-06-20

## What is CVE-2026-56307?

Cap-go before 12.128.12 contains a broken cursor pagination vulnerability in the /private/devices endpoint on the Cloudflare/workerd path that allows authenticated attackers to cause duplicate-page loops and make later rows unreachable. Attackers with app.read_devices access can exploit non-advancing cursor filters to trigger infinite pagination loops, prevent dataset traversal, and cause repeated processing in device-management workflows.

The record classifies CVE-2026-56307 under weakness class [CWE-670](https://cwe.mitre.org/data/definitions/670.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 107 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **CVSS v4.0 base score:** 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-20

## Is CVE-2026-56307 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Cap-go](https://intel.threadlinqs.com/vendors/capgo): capgo

## How to fix CVE-2026-56307

No vendor patch reference has been recorded for CVE-2026-56307 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-56307

No threat campaign in the Threadlinqs corpus currently references CVE-2026-56307, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, GitHub Security Advisories. Last verified by Threadlinqs on 2026-06-21.

**Vendor advisory and patch**

- [github.com — vendor advisory](https://github.com/Cap-go/capgo/security/advisories/GHSA-8p6w-x7jg-v4xq)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/cap-go-broken-cursor-pagination-in-private-devices-endpoint)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-56307
Full detection coverage and IOCs for threats exploiting CVE-2026-56307 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp