# CVE-2026-111931 — coder

> As of 2026-10-18, CVE-2026-111931 is a MEDIUM-severity vulnerability in coder, CVSS v3.1 4.3, EPSS 0.1% (5.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-111931 as of 2026-10-18; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-10-18

## What is CVE-2026-111931?

Coder from 2.0.0 before 2.34.8 contains an open redirect vulnerability in handleAPIKeySmuggling that allows attackers to redirect users externally via unsanitized r.URL.Path values. Attackers can craft links on trusted workspace app subdomains with paths beginning with double slashes, which become scheme-relative redirects to attacker sites for phishing.

The record classifies CVE-2026-111931 under weakness class [CWE-601](https://intel.threadlinqs.com/cwe/CWE-601). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 26 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **CVSS v4.0 base score:** 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 5.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-17

## Is CVE-2026-111931 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [coder](https://intel.threadlinqs.com/vendors/coder): coder

## How to fix CVE-2026-111931

Vendor advisory: [https://github.com/coder/coder/security/advisories/GHSA-98qx-9p2x-c4wh](https://github.com/coder/coder/security/advisories/GHSA-98qx-9p2x-c4wh). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-111931

No threat campaign in the Threadlinqs corpus currently references CVE-2026-111931, 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, GitHub Security Advisories, FIRST EPSS. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — vendor advisory](https://github.com/coder/coder/security/advisories/GHSA-98qx-9p2x-c4wh)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/coder-2.0.0-before-2.34.8-open-redirect-via-workspace-app-proxy)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-111931
No Threadlinqs detection currently covers CVE-2026-111931; it is re-checked on every ingest.
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