SFTPGo: Stored XSS via inline parameter on public shares and user file download
Collected exploitation and prediction evidence
Risk source coverageCISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.
No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.
cve-program · CVE-2026-49245
PublishedSFTPGo 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.
- Source published
- 20 Aug 2026 21:52:20 UTC
- Source modified
- 21 Aug 2026 15:35:53 UTC
- Observed here
- 23 Oct 2026 15:48:27 UTC
- Source terms
- CVE Program Terms of Use
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CVSS 3.1 · 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
euvd · EUVD-2026-63709
PublishedSFTPGo 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.
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Aug 20, 2026, 9:52:20 PM
dateUpdated: Aug 21, 2026, 3:35:53 PM
- Source published
- Aug 20, 2026, 9:52:20 PM (timezone not stated)
- Source modified
- Aug 21, 2026, 3:35:53 PM (timezone not stated)
- Observed here
- 7 Nov 2026 11:31:15 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 3.1 · 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
nvd · CVE-2026-49245
PublishedSFTPGo 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.
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Deferred
Weakness classifications: CWE-79
Original publisher date fields
published: 2026-08-20T22:17:20.107
lastModified: 2026-10-18T20:10:00.110
- Source published
- 20 Aug 2026 22:17:20 UTC
- Source modified
- 18 Oct 2026 20:10:00 UTC
- Observed here
- 25 Oct 2026 12:17:32 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS 3.1 · [email protected] · Secondary · 3.7 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
osv · GHSA-3vcg-pv95-pq54
Published## Summary The inline query parameter on the browsable-share file download and on the authenticated user file download suppressed Content-Disposition: attachment, so an HTML file stored in a share or home directory could be served as text/html and execute in SFTPGo's web origin (stored XSS). ## Impact Low. Exploitation requires the attacker to place the file and a victim to open the crafted link — a URL the WebClient never generates, so it requires social engineering — and the practical conditions are narrow: - Session cookies are HttpOnly, so the cookie cannot be read by the injected script. - Authenticated shares set their own session cookie, which overwrites the victim's WebClient cookie, no account pivot. The realistic case is a public share, or a folder shared between distinct users combined with targeted social engineering. It is a genuine trust-boundary violation (SFTPGo emits attacker-controlled content as active HTML in its own origin), hence an advisory, but the constrained preconditions and the HttpOnly mitigation keep it Low. ## Patches Upgrade to v2.7.3. These endpoints now always respond with Content-Disposition: attachment; the inline parameter has been removed. See the fix commit for the full technical rationale.
- Source published
- 2 Jul 2026 19:09:30 UTC
- Source modified
- 7 Jul 2026 16:11:31 UTC
- Observed here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
Publisher rating · LOW
osv · GO-2026-5900
PublishedSFTPGo has stored XSS via inline parameter on public shares and user file download in github.com/drakkan/sftpgo
- Source published
- 7 Jul 2026 15:26:37 UTC
- Source modified
- 7 Jul 2026 16:00:24 UTC
- Observed here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- OSV · upstream source license applies
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.