Improper Enforcement of Message Integrity During Transmission in a Communication Channel Affecting erlang-sasl package, versions *
Threat Intelligence
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Test your applications- Snyk IDSNYK-RHEL10-ERLANGSASL-17814227
- published4 Jul 2026
- disclosed2 Jul 2026
Introduced: 2 Jul 2026
NewCVE-2026-54891 (opens in a new tab)How to fix?
There is no fixed version for RHEL:10 erlang-sasl.
NVD Description
Note: Versions mentioned in the description apply only to the upstream erlang-sasl package and not the erlang-sasl package as distributed by RHEL.
See How to fix? for RHEL:10 relevant fixed versions and status.
Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in Erlang/OTP ssl (tls_gen_connection module) allows a network-positioned attacker to inject unauthenticated plaintext that the TLS client application later treats as authenticated server data.
The function tls_gen_connection:handle_protocol_record/3 rejects APPLICATION_DATA records that arrive in pre-handshake states when the TLS endpoint acts as a server, but does not apply the same check when the endpoint acts as a client. A network-positioned attacker can send plaintext APPLICATION_DATA records to the client during the handshake. The records are buffered and, once the handshake completes successfully, delivered to the application as if they were authenticated post-handshake data. The attacker cannot observe the client's response or steer the connection, so the impact is limited to blind injection of unauthenticated bytes. The injection window is wider for TLS versions prior to TLS 1.3 than for TLS 1.3.
This vulnerability is associated with program file lib/ssl/src/tls_gen_connection.erl.
This issue affects OTP from OTP 17.0 before 29.0.3, 28.5.0.3 and 27.3.4.14 corresponding to ssl from 5.3.4 before 11.7.3, 11.6.0.3 and 11.2.12.10. TLS 1.3 is affected starting with OTP 22.0, when TLS 1.3 support was added.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2496625
- https://access.redhat.com/security/cve/CVE-2026-54891
- https://cna.erlef.org/cves/CVE-2026-54891.html
- https://github.com/erlang/otp/commit/07d2d0e93f6aaf7652a81e8df075fc1728da5e96
- https://github.com/erlang/otp/security/advisories/GHSA-gf6r-99xw-6qg6
- https://osv.dev/vulnerability/EEF-CVE-2026-54891
- https://www.erlang.org/doc/system/versions.html#order-of-versions