# CVE-2026-54659 — ddnexus pagy

> As of 2026-07-29, CVE-2026-54659 is a Medium-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in ddnexus pagy, CVSS v4.0 6.9, EPSS 0.3% (29.4th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-54659 as of 2026-07-29; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-29

## What is CVE-2026-54659?

Pagy is agnostic pagination in plain Ruby. From 43.0.0 until 43.5.6, Pagy::I18n.locale= in gem/lib/pagy/modules/i18n/i18n.rb stored locale values verbatim and later used them as .yml path components, allowing untrusted params[:locale] values with absolute paths or ../ sequences to create a file existence and readability oracle for YAML files. This issue is fixed in version 43.5.6.

The record classifies CVE-2026-54659 under weakness classes [CWE-22](https://intel.threadlinqs.com/cwe/CWE-22), [CWE-200](https://intel.threadlinqs.com/cwe/CWE-200). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 69 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 6.9 — Medium (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 29.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-28, last modified 2026-07-29

## Is CVE-2026-54659 being exploited?

It currently carries a trending score of 37 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **ddnexus**: pagy

## How to fix CVE-2026-54659

No vendor patch reference has been recorded for CVE-2026-54659 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-2026-54659

No threat campaign in the Threadlinqs corpus currently references CVE-2026-54659, 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, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-07-29. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/ddnexus/pagy/security/advisories/GHSA-2xmw-f8j8-wfxc)

**Other references**

- [github.com](https://github.com/ddnexus/pagy/pull/908)
- [github.com (efcf09690e9fa7d7abdfb987b785a55f87e287df)](https://github.com/ddnexus/pagy/commit/efcf09690e9fa7d7abdfb987b785a55f87e287df)
- [github.com (43.5)](https://github.com/ddnexus/pagy/releases/tag/43.5.6)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-54659
Full detection coverage and IOCs for threats exploiting CVE-2026-54659 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp