# CVE-2026-28508: Idno Vulnerable to Unauthenticated SSRF via URL Unfurl Endpoint

Source: https://junglewise.ai/threats/cve-2026-28508-idno-vulnerable-to-unauthenticated-ssrf-via-url-unfurl-endpoint  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-02  
License: CC BY 4.0 with a link back

CVE-2026-28508 · Severity: medium · CVSS 4 · Published 2026-03-02

Idno Vulnerable to Unauthenticated SSRF via URL Unfurl Endpoint

Technologies: [idno/known (Packagist)](https://junglewise.ai/threats/technologies/idno-known). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2026-28508 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28508 being exploited in the wild.

**How severe is CVE-2026-28508?** Medium severity, with a CVSS score of 4, published 2 March 2026.

**Which products and versions are affected?** idno/known (Packagist) ECOSYSTEM:introduced=0,fixed=1.6.4.

**Is there a fix for CVE-2026-28508?** Yes. idno/known (Packagist): upgrade to 1.6.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-28508?** Check whether you run idno/known (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- idno/known (Packagist): upgrade to 1.6.4 or later

  ```sh
  composer require idno/known:^1.6.4
  ```


## Affected products

- idno/known (Packagist) ECOSYSTEM:introduced=0,fixed=1.6.4

## Identifiers

- CVE-2026-28508
- GHSA-fcrh-fqxh-6fx6

## Related threats

- [Idno Vulnerable to Remote Code Execution via Chained Import File Write and Template Path Traversal](https://junglewise.ai/threats/cve-2026-28507-idno-vulnerable-to-remote-code-execution-via-chained-import-file)
- [Known affected by Account Takeover via Password Reset Token Leakage](https://junglewise.ai/threats/cve-2026-26273-known-affected-by-account-takeover-via-password-reset-token)
- [Known vulnerable to code execution via SVG file in v1.3.1](https://junglewise.ai/threats/cve-2022-32115-known-vulnerable-to-code-execution-via-svg-file-in-v1-3-1)
- [Known v1.3.1 Cross-site Scripting](https://junglewise.ai/threats/cve-2022-31290-known-v1-3-1-cross-site-scripting)
- [Known vulnerable to account takeover via host header injection attack in v1.3.1](https://junglewise.ai/threats/cve-2022-33011-known-vulnerable-to-account-takeover-via-host-header-injection)