# CVE-2026-111934 — coder

> As of 2026-10-17, CVE-2026-111934 is a LOW-severity vulnerability in coder, CVSS v3.1 3.7, EPSS 0.1% (1.8th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-111934 as of 2026-10-17; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-10-17

## What is CVE-2026-111934?

Coder before 2.34.7 contains an IP spoofing vulnerability in the ExtractRealIPAddress middleware that trusts the leftmost, client-supplied X-Forwarded-For value instead of the client IP appended by a reverse proxy. Attackers can send forged X-Forwarded-For values through appending proxies to bypass per-IP rate limits on login, one-time passcode, and password validation endpoints, enabling brute-force attacks, and to falsify IP addresses recorded in audit logs.

The record classifies CVE-2026-111934 under weakness class [CWE-348](https://cwe.mitre.org/data/definitions/348.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 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:** 3.7 — LOW (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **CVSS v4.0 base score:** 6.3 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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 1.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 1.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-17

## Is CVE-2026-111934 being exploited?

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

## Affected products and versions

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

## How to fix CVE-2026-111934

Vendor advisory: [https://github.com/coder/coder/security/advisories/GHSA-vprw-xcrv-287h](https://github.com/coder/coder/security/advisories/GHSA-vprw-xcrv-287h). 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-2026-111934

No threat campaign in the Threadlinqs corpus currently references CVE-2026-111934, 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-vprw-xcrv-287h)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/coder-before-2.34.7-ip-spoofing-via-x-forwarded-for-header)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-111934
No Threadlinqs detection currently covers CVE-2026-111934; it is re-checked on every ingest.
Indicator values unlock with TL Creds (https://threadlinqs.com/tl-creds); MCP access for AI agents needs Purple: https://intel.threadlinqs.com/mcp