Bug 2441326 (CVE-2026-21620)

Summary: CVE-2026-21620 erlang: Erlang OTP tftp_file modules: Information disclosure via relative path traversal
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: eglynn, jjoyce, jschluet, lhh, mburns, mgarciac
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in Erlang OTP tftp_file modules. This vulnerability allows an attacker to exploit a weakness in how file paths are handled, known as Relative Path Traversal. By manipulating these paths, an attacker could gain unauthorized access to sensitive files on the system, potentially leading to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2441330, 2441331, 2441332    
Bug Blocks:    

Description OSIDB Bzimport 2026-02-20 12:01:37 UTC
Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftp_file modules), erlang otp inets (tftp_file modules), erlang otp tftp (tftp_file modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftp_file.erl, src/tftp_file.Erl.

This issue affects otp: from 17.0, from 07b8f441ca711f9812fad9e9115bab3c3aa92f79; otp: from 5.10 before 7.0; otp: from 1.0.