# CVE-2026-72815: golang-github-go-chi-chi: go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which bl...

CVE-2026-72815 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-72815, released August 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-72815
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0050
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 14, 2026

## Description

go-chi chi versions >= 5.2.1 and before 5.3.0 contain an IP spoofing vulnerability in the RealIP middleware, which blindly trusts the first (leftmost) value of the X-Forwarded-For HTTP header. A remote attacker can bypass IP-based access control lists and rate-limiting mechanisms, and forge log entries, by supplying a spoofed IP address in the X-Forwarded-For header. The issue is fixed in version 5.3.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | cloudflared opensuse-leap 16.0 | 2026.8.2-bp160.1.1 | [OPENSUSE-SU-2026:21670-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21670-1.md) | Aug 27, 2026 |
| Linux | golang-github-go-chi-chi Debian 14 | 5.3.0-1 | [DEBIAN-CVE-2026-72815](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72815.md) | Aug 14, 2026 |
| Linux | hauler opensuse-leap 16.0 | 2.1.0-bp160.1.1 | [OPENSUSE-SU-2026:21793-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21793-1.md) | Sep 3, 2026 |
| Linux | trivy opensuse-leap 16.0 | 0.74.0-160000.1.1 | [OPENSUSE-SU-2026:21645-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21645-1.md) | Aug 25, 2026 |
| Linux | v2ray-core opensuse-leap 16.0 | 5.53.0-bp160.1.1 | [OPENSUSE-SU-2026:21653-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21653-1.md) | Aug 25, 2026 |
| Linux | warewulf4 opensuse-leap 16.0 | 4.7.1-bp160.1.1 | [OPENSUSE-SU-2026:21918-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21918-1.md) | Sep 18, 2026 |

---

Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.