Highest advisory severityMedium 2 vendors · 2 advisories

CVE-2026-54891

Erlang/OTP Vulnerability in NetApp Products

CVE-2026-54891: Erlang/OTP Vulnerability in NetApp Products. Not in the CISA KEV catalog. Medium advisory severity (CVSS 6.3, NetApp).

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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CVE-2026-54891 key facts

CISA KEV: Not listed (catalog checked Nov 5, 2026)
Highest advisory severity: Medium
CVSS base score: 6.3 (NetApp), 3.7 (Red Hat)
Fixed releases: Red Hat: erlang27-main-27.3.4.17-1.hum1, RHSA-2026:63160
Vendor advisories: 2 from NetApp, Red Hat
VulniPulse record: Published Jul 13, 2026 · Updated Nov 4, 2026

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-54891; bulletin-wide values are not repeated here.

Is CVE-2026-54891 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-54891 is not in the CISA KEV catalog (checked Nov 5, 2026) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-54891?

Upgrade to a fixed release named by the vendor:

Red Hat: erlang27-main-27.3.4.17-1.hum1, RHSA-2026:63160

Vendor advisory comparison

NetApp

1 advisory

Advisory severityMedium6.3
Medium [CVE-2026-54891] Erlang/OTP Vulnerability in NetApp Products
NTAP-20261104-0020Source published Nov 4, 2026Source updated Nov 4, 2026
Erlang/OTP versions 17 through 27.3.4.13, 28 through 28.5.0.2, and 29 through 29.0.2 are susceptible to a vulnerability which when successfully exploited could allow a network-positioned attacker to inject unauthenticated plaintext that the TLS client application later treats as authenticated server data. Successful exploitation of this vulnerability could lead to addition or modification of data. Affected products: ONTAP Select Deploy administration utility. NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.
Affected products in this advisory
ONTAP Select Deploy administration utility
Source-reported affected versions
27.3.4.13
28.5.0.2
29.0.2
Source-reported fixed versions
No fixed-version detail extracted. This does not mean no fix exists.
Mitigation guidance
No mitigation guidance extracted; consult the source.
Full advisory and evidence Open source bulletin

Red Hat

1 advisory

Advisory severityLow3.7
Low [CVE-2026-54891] Unauthenticated data injection during TLS handshake
CVE-2026-54891Source published Jul 2, 2026Source updated Jul 2, 2026
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. 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…
Affected products in this advisory
Red Hat Hardened Images
Red Hat OpenStack Platform 16.2
Red Hat OpenStack Platform 17.1
Red Hat OpenStack Platform 18.0
Source-reported affected versions
< 1.3
< 27.3.4.14
< 28.0
< 28.5.0.3
9 more entries in the full advisory.
Source-reported fixed versions
erlang27-main-27.3.4.17-1.hum1
RHSA-2026:63160
Mitigation guidance
No mitigation guidance extracted; consult the source.
Full advisory and evidence Open source bulletin

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