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CVE-2026-21620VulnerabilityPublished Updated

SUSE · Security update for erlang

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-21620· Low 2.3

Not known to be exploited · CVSS 2.3 Low · fixed in SUSE package updates : update SUSE otp when convenient.

Data as of 31 Oct 2026, 08:20 UTC

CVSS 4.0 base score
2.3Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 7.0, 26.2.5.17, 1.1.1.1
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade OTP and inets to 7.0; erlang/otp to 26.2.5.17; tftp to 1.1.1.1.

Affected software

ProductAffectedFixed in
ErlangOTPAffected
  • >=17.0 <26.2.5.17
Fixed in–
ErlangOTPAffected
  • >=5.10 <7.0
Fixed in
  • 7.0
ErlangOTPAffected
  • >=1.0 <1.1.1.1
Fixed in–
GitHuberlang/otppkg:github/erlang/otpOther threatsAffected
  • >=17.0 <26.2.5.17
Fixed in
  • 26.2.5.17
GitHubinetspkg:github/inetsOther threatsAffected
  • >=5.10 <7.0
Fixed in
  • 7.0
GitHubtftppkg:github/tftpOther threatsAffected
  • >=1.0 <1.1.1.1
Fixed in
  • 1.1.1.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for erlang fixes the following issues: Security issues fixed: - CVE-2026-21620: improper isolation and compartmentalization can lead to TFTP relative path traversal and remote arbitrary reads/writes (bsc#1258663). - CVE-2026-23941: improper handling of duplicate Content-Length headers in Erlang OTP can lead to HTTP request smuggling (bsc#1259687). - CVE-2026-23942: improper limitation of a pathname to a restricted directory in the SFTP server can lead to path traversal (bsc#1259681). - CVE-2026-23943: improper handling of highly compressed data in Erlang OTP ssh can lead to denial of service (bsc#1259682). - CVE-2026-28808: incorrect authorization can lead to unauthenticated access to protected CGI scripts (bsc#1261728). - CVE-2026-28810: predictable DNS transaction IDs can lead to DNS cache poisoning (bsc#1261726). - CVE-2026-32144: missing signature verification can lead to OCSP authorization bypass and information disclosure (bsc#1261734). Other updates and bugfixes: - jinterface: allow to build determenistic OtpErlang.jar (bsc#1262288).

References

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