CVE-2026-48858

Published: Giu 10, 2026 Last Modified: Giu 11, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,3
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM 6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: none

Description

AI Translation Available

Server-Side Request Forgery (SSRF) vulnerability in Erlang/OTP ftp (ftp_internal module) allows FTP bounce attacks and SSRF via an unvalidated PASV response IP address.

The ftp_internal:handle_ctrl_result/2 PASV handler (mode=passive, ipfamily=inet, ftp_extension=false) extracts the IP address from the server's 227 response and passes it directly to gen_tcp:connect/4 without validating it against the control connection peer address. The adjacent EPSV handlers correctly call peername(CSock) to derive the IP from the control connection, but the PASV handler does not. A malicious or compromised FTP server can redirect the client's data connection to an arbitrary internal host and port. On read operations (ftp:ls/1,2, ftp:nlist/1,2, ftp:recv/2,3), data from the redirected target is returned to the caller. On write operations (ftp:send/2,3, ftp:append/2,3), file content is sent to the redirected target. This enables SSRF against internal hosts, cloud metadata endpoints, and FTP bounce attacks against third-party hosts.

The vulnerable path is the default configuration (mode=passive, ipfamily=inet, ftp_extension=false). RFC 2577 section 3 explicitly recommends validating the PASV response IP against the control connection peer.

The ftp application is deprecated and scheduled for removal in OTP-30.

This vulnerability is associated with program files lib/inets/src/ftp/ftp_internal.erl (inets 5.10.4 through 6.5, OTP 17.4 through 20.3) and lib/ftp/src/ftp_internal.erl (ftp 1.0 and later, OTP 21.0 and later).

This issue affects OTP from OTP 17.4 before 29.0.2, 28.5.0.2 and 27.3.4.13 corresponding to inets from 5.10.4 before 7.0 and ftp from 1.0 before 1.2.6, 1.2.4.1 and 1.2.3.1.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0023
Percentile
0,1th
Updated

EPSS Score Trend (Last 5 Days)

918

Server-Side Request Forgery (SSRF)

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Access Control
Potential Impacts:
Read Application Data Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Technologies: Web Based, AI/ML, Web Server
View CWE Details
Application

Erlang\/Otp by Erlang

Product Information
Vendor Erlang
Product Erlang\/Otp
Version Range Affected
From 17.4 (inclusive)
To 27.3.4.13 (exclusive)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Ftp by Erlang

Product Information
Vendor Erlang
Product Ftp
Version Range Affected
From 1.2.5 (inclusive)
To 1.2.6 (exclusive)
cpe:2.3:a:erlang:ftp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Erlang\/Inets by Erlang

Product Information
Vendor Erlang
Product Erlang\/Inets
Version Range Affected
From 5.10.4 (inclusive)
To 7.0 (exclusive)
cpe:2.3:a:erlang:erlang\/inets:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Ftp by Erlang

Product Information
Vendor Erlang
Product Ftp
Version Range Affected
From 1.2.4 (inclusive)
To 1.2.4.1 (exclusive)
cpe:2.3:a:erlang:ftp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Erlang\/Otp by Erlang

Product Information
Vendor Erlang
Product Erlang\/Otp
Version Range Affected
From 28.0 (inclusive)
To 28.5.0.2 (exclusive)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Ftp by Erlang

Product Information
Vendor Erlang
Product Ftp
Version Range Affected
From 1.0 (inclusive)
To 1.2.3.1 (exclusive)
cpe:2.3:a:erlang:ftp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Erlang\/Otp by Erlang

Product Information
Vendor Erlang
Product Erlang\/Otp
Version Range Affected
From 29.0 (inclusive)
To 29.0.2 (exclusive)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://cna.erlef.org/cves/CVE-2026-48858.html
https://cna.erlef.org/cves/CVE-2026-48858.html
https://github.com/erlang/otp/commit/2691a806231ffd0490a8a9…
https://github.com/erlang/otp/commit/2691a806231ffd0490a8a9e20500dec0c7e73727
https://github.com/erlang/otp/commit/521bcfa24407ee8cb56148…
https://github.com/erlang/otp/commit/521bcfa24407ee8cb5614823cf905c37ea3aa605
https://github.com/erlang/otp/security/advisories/GHSA-24cv…
https://github.com/erlang/otp/security/advisories/GHSA-24cv-hwgr-37fq
https://osv.dev/vulnerability/EEF-CVE-2026-48858
https://osv.dev/vulnerability/EEF-CVE-2026-48858
https://www.erlang.org/doc/system/versions.html#order-of-ve…
https://www.erlang.org/doc/system/versions.html#order-of-versions