# CVE-2026-86751: Snipe-IT markdown image injection in mail notifications

Source: https://junglewise.ai/threats/cve-2026-86751-snipe-it-markdown-image-injection-in-mail-notifications  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-09. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-86751 · Severity: high · CVSS 8.5 · Published 2026-09-09

Snipe-IT is an asset management platform used by organizations to track hardware and equipment inventory. An authenticated attacker can inject markdown image syntax into checkout acceptance note fields; the platform fails to sanitize this input before rendering it in outbound email notifications. When processed, this allows the attacker to read arbitrary files from the server (including the .env configuration file) or force the server to make HTTP requests to external systems, potentially exposing API keys and other sensitive credentials.

Technologies: [Snipeitapp Snipe-It](https://junglewise.ai/threats/technologies/snipe-it). Vendors: [Snipeitapp](https://junglewise.ai/threats/vendors/snipeitapp).

## Quick answers

**Is CVE-2026-86751 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86751 being exploited in the wild.

**How severe is CVE-2026-86751?** High severity, with a CVSS score of 8.5, published 9 September 2026.

**Which products and versions are affected?** Snipe-IT Snipe-IT before 8.7.0.

**Is there a fix for CVE-2026-86751?** A patch was published on 2026-09-09: Fix released in version 8.7.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-86751 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-86751?** Check whether you run Snipeitapp Snipe-It. 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.

## Technical details

The vulnerability is a mail-based SSRF and arbitrary file read flaw rooted in improper markdown sanitization (CWE-73, CWE-918). When an authenticated user submits a checkout acceptance note containing markdown image syntax (e.g., ![x](/etc/hostname)), Blade template escaping only neutralizes HTML metacharacters but not markdown punctuation. The input then passes to the Laravel CommonMark parser, which converts it to an <img src="/etc/hostname"> tag. The laravel-mail-auto-embed library recursively processes outbound mail HTML and resolves <img src> attributes via file_get_contents() for local paths or curl for URLs, embedding fetched content into the email as a MIME attachment. An attacker can exfiltrate the .env file (containing APP_KEY, the encryption master key for the entire application) or force the server to contact arbitrary external URLs. Patched in version 8.7.0 via a custom CommonMark extension that strips markdown image syntax before it reaches the parser.

## Affected products

- Snipe-IT Snipe-IT before 8.7.0

## Timeline

- 2026-07-31: disclosed: Reported under coordinated disclosure
- 2026-08-24: advisory: GitHub security advisory published
- 2026-09-09: patched: Fix released in version 8.7.0

## References

- [https://github.com/grokability/snipe-it/security/advisories/GHSA-f3vq-g24v-xc2g](https://github.com/grokability/snipe-it/security/advisories/GHSA-f3vq-g24v-xc2g)
- [https://www.vulncheck.com/advisories/snipe-it-before-8.7.0-arbitrary-file-read-and-ssrf-via-markdown](https://www.vulncheck.com/advisories/snipe-it-before-8.7.0-arbitrary-file-read-and-ssrf-via-markdown)

## Related threats

- [Snipe-IT broken access control in Asset Model file attachments](https://junglewise.ai/threats/cve-2026-86774-snipe-it-broken-access-control-in-asset-model-file-attachments)
- [Snipe-IT broken access control in Predefined Kit endpoints](https://junglewise.ai/threats/cve-2026-86773-snipe-it-broken-access-control-in-predefined-kit-endpoints)
- [Snipe-IT stored cross-site scripting in department names](https://junglewise.ai/threats/cve-2026-86772-snipe-it-stored-cross-site-scripting-in-department-names)
- [Snipe-IT acceptance PDF server-side request forgery via unescaped employee_num](https://junglewise.ai/threats/cve-2026-86771-snipe-it-acceptance-pdf-server-side-request-forgery-via-unescaped)
- [Snipe-IT authentication bypass in SAML username collation](https://junglewise.ai/threats/cve-2026-86770-snipe-it-authentication-bypass-in-saml-username-collation)