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CVE Record

CVE-2026-28295: Gvfs: gvfs ftp backend: information disclosure via untrusted pasv responses

A flaw was found in the FTP GVfs backend. A malicious FTP server can exploit this vulnerability by providing an arbitrary IP address and port in its passive mode (PASV) response. The client unconditionally trusts this information and attempts to connect to the specified endpoint, allowing the malicious server to probe for open ports accessible from the client's network.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-28295 is a medium-severity information disclosure issue in the GVfs FTP backend. If a user connects to a malicious FTP server, that server can make the client attempt connections to internal or otherwise reachable network addresses, helping the attacker identify open ports.

Executive priority

Treat as a moderate priority. It is not a direct system takeover issue, but it can help attackers map internal services when users interact with malicious FTP servers.

Technical view

The GVfs FTP backend trusts arbitrary IP address and port values returned in FTP PASV responses. This creates an SSRF-like port probing condition from the client’s network perspective. Red Hat lists gvfs on Red Hat Enterprise Linux 6, 7, 8, 9, and 10 as affected.

Likely exposure

Exposure is most relevant on Linux desktop or server systems using GVfs FTP functionality where users or applications can connect to untrusted FTP servers.

Exploitation context

Exploitation requires user interaction: the client must connect to a malicious FTP server. The provided sources do not indicate active exploitation, and the CVE is not listed as KEV in the supplied bundle.

Researcher notes

The issue maps to CWE-918 and behaves like client-side SSRF through trusted PASV data. Sources do not provide fixed versions, exploit evidence, or detailed remediation beyond vendor tracking.

Mitigation direction

  • Check Red Hat guidance for updated gvfs packages or advisories.
  • Limit use of FTP connections to trusted servers.
  • Restrict outbound network access where GVfs FTP clients are used.
  • Educate users not to open untrusted FTP locations.

Validation and detection

  • Inventory RHEL 6 through 10 systems with gvfs installed.
  • Identify systems where GVfs FTP access is enabled or used.
  • Review vendor advisories for fixed package versions when available.
  • Assess outbound network controls from exposed desktop environments.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-918: Information exposure and cloud metadata lookup

Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-28295 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2026-28295Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 10gvfsaffected
Red HatRed Hat Enterprise Linux 6gvfsaffected
Red HatRed Hat Enterprise Linux 7gvfsaffected
Red HatRed Hat Enterprise Linux 8gvfsaffected
Red HatRed Hat Enterprise Linux 9gvfsaffected
Weakness

CWE details

CWE-918

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-918 · source CWE mapping

Server-Side Request Forgery (SSRF)

Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs