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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: erlang: CVE-2026-21620
Message-ID: <177175493657.1998071.1398261516518493693.reportbug@eldamar.lan>
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Date: Sun, 22 Feb 2026 11:08:56 +0100
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Source: erlang
Version: 1:27.3.4.6+dfsg-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/erlang/otp/pull/10706
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>
Control: found -1 1:27.3.4.1+dfsg-1
Control: found -1 1:25.2.3+dfsg-1
Control: found -1 1:25.2.3+dfsg-1+deb12u1
Control: found -1 1:25.2.3+dfsg-1+deb12u3

Hi,

The following vulnerability was published for erlang.

CVE-2026-21620[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-21620
    https://www.cve.org/CVERecord?id=CVE-2026-21620
[1] https://github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvp
[2] https://github.com/erlang/otp/pull/10706
[3] https://github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354e
[4] https://github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]