Low severityNVD Advisory· Published Feb 20, 2026· Updated Jul 24, 2026
CVE-2026-21620
CVE-2026-21620
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 OTP 17.0 before OTP 28.3.2, OTP 27.3.4.8 and OTP 26.2.5.17, corresponding to tftp from 1.0 before 1.2.4, 1.2.2.1 and 1.1.1.1; also inets from 5.10 before 7.0.
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Affected products
4- osv-coords2 versionspkg:rpm/opensuse/erlang&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/erlang27&distro=openSUSE%20Tumbleweed
< 27.1.3-160000.4.1+ 1 more
- (no CPE)range: < 27.1.3-160000.4.1
- (no CPE)range: < 27.1.3-2.1
Patches
Vulnerability mechanics
References
8- cna.erlef.org/cves/CVE-2026-21620.htmlnvd
- github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354envd
- github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344nvd
- github.com/erlang/otp/commit/696fdec922661d4a3cc528fc34bc24fae8d4ad8anvd
- github.com/erlang/otp/pull/10706nvd
- github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvpnvd
- osv.dev/vulnerability/EEF-CVE-2026-21620nvd
- www.erlang.org/doc/system/versions.htmlnvd
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