Highest advisory severityCritical 2 vendors · 2 advisories

CVE-2026-75803

OpenSSL Vulnerability in NetApp Products

CVE-2026-75803: OpenSSL Vulnerability in NetApp Products. Not in the CISA KEV catalog. Critical advisory severity (CVSS 9.1, 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-2026-75803 key facts

CISA KEV: Not listed (catalog checked Nov 5, 2026)
Highest advisory severity: Critical
CVSS base score: 9.1 (NetApp), 3.7 (Red Hat)
Weakness: CWE-354
Fixed releases: Red Hat: openssl-1:3.5.8-1.el9_8, chunkah-main-0.6.0-3.hum1, python-cryptography-main-50.0.0-1.hum1, rust-bootupd-main-0.2.36-3.hum1, openssl3-main-3.5.8-0.1.hum1, openssl-main-3.5.8-0.1.hum1 and 12 more in the advisory
Vendor advisories: 2 from NetApp, Red Hat
VulniPulse record: Published Sep 2, 2026 · Updated Oct 9, 2026

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-75803; bulletin-wide values are not repeated here.

Is CVE-2026-75803 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-75803 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-2026-75803?

Upgrade to a fixed release named by the vendor:

Red Hat: openssl-1:3.5.8-1.el9_8, chunkah-main-0.6.0-3.hum1, python-cryptography-main-50.0.0-1.hum1, rust-bootupd-main-0.2.36-3.hum1, openssl3-main-3.5.8-0.1.hum1, openssl-main-3.5.8-0.1.hum1

To mitigate this ensure that all integrity check values present in messages are properly checked in accordance with the protocol specification before they are parsed and used. Applications must rigorously calculate the checksum and explicitly verify that the received integrity value matches the calculated one to prevent malicious data injection. (Red Hat)

Vendor advisory comparison

NetApp

1 advisory

Advisory severityCritical9.1
Critical [CVE-2026-75803] OpenSSL Vulnerability in NetApp Products
NTAP-20260902-0002Source published Sep 2, 2026Source updated Oct 9, 2026
OpenSSL versions 4.0, 3.6, 3.5, 3.4, and 3.0 are susceptible to a vulnerability which when successfully exploited could lead to applications calling EVP_Cipher() accepting forged messages. Successful exploitation of this vulnerability could lead to disclosure of sensitive information or addition or modification of data. 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
No product details extracted. Check the source bulletin.
Source-reported affected versions
Affected-version details not available in this record.
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-2026-75803] AEAD forgeries possible with empty ciphertext in EVP_Cipher
CVE-2026-75803Source published Aug 25, 2026Source updated Aug 25, 2026
Issue summary: ChaCha20-Poly1305 and AES-OCB decryption with an empty ciphertext can report success without verifying the supplied authentication tag when the operation is finalized by calling the EVP_Cipher() function. Impact summary: Applications calling EVP_Cipher() on an empty ciphertext and expecting the call to check the AEAD tag may accept forged messages. CWE: CWE-354 (Improper Validation of Integrity Check Value) Description: The EVP_Cipher() API call for AEAD ciphers behaves like a one shot encryption and decryption call. However for AES-OCB and ChaCha20-Poly1305 ciphers it skipped the AEAD tag verification when an empty ciphertext was passed to the function. The callers of this function might believe that a successful return indicates a valid AEAD tag for these ciphers, even…
Affected products in this advisory
Red Hat Enterprise Linux 9
Red Hat Hardened Images
Ansible Automation Orchestrator 2026
Confidential Cluster Operator
50 more entries in the full advisory.
Source-reported affected versions
Affected-version details not available in this record.
Source-reported fixed versions
openssl-1:3.5.8-1.el9_8
chunkah-main-0.6.0-3.hum1
python-cryptography-main-50.0.0-1.hum1
rust-bootupd-main-0.2.36-3.hum1
14 more entries in the full advisory.
Mitigation guidance
To mitigate this ensure that all integrity check values present in messages are properly checked in accordance with the protocol specification before they are parsed and used. Applications must rigorously calculate the checksum and explicitly verify that the received integrity value matches the calculated one to prevent malicious data injection.
Full advisory and evidence Open source bulletin

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