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2.3
Erlang OTP TFTP File Path Error
CVE-2026-21620
Summary
An error in the Erlang OTP software allows an attacker to access files they shouldn't be able to. This could allow an attacker to read or write sensitive data. Erlang OTP users should update to the latest version to fix this issue.
Original title
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 modu...
Original description
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.
This issue affects otp: from 17.0, from 07b8f441ca711f9812fad9e9115bab3c3aa92f79; otp: from 5.10 before 7.0; otp: from 1.0.
nvd CVSS4.0
2.3
Vulnerability type
CWE-23
- https://github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354e
- https://github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344
- https://github.com/erlang/otp/commit/696fdec922661d4a3cc528fc34bc24fae8d4ad8a
- https://github.com/erlang/otp/pull/10706
- https://github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvp
- https://www.erlang.org/doc/system/versions.html#order-of-versions
Published: 20 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026