VDB-356720 · CVE-2026-5479 · Nessus 305897

wolfSSL up to 5.9.0 EVP API wolfSSL_EVP_CipherFinal integrity check

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3.6	$0-$5k	0.14

Summaryinfo

A vulnerability classified as problematic was found in wolfSSL up to 5.9.0. Affected by this issue is the function wolfSSL_EVP_CipherFinal of the component EVP API. Such manipulation leads to integrity check. This vulnerability is referenced as CVE-2026-5479. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in wolfSSL up to 5.9.0 and classified as problematic. Affected by this issue is the function wolfSSL_EVP_CipherFinal of the component EVP API. The manipulation with an unknown input leads to a integrity check vulnerability. Using CWE to declare the problem leads to CWE-354. The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission. Impacted is integrity. CVE summarizes:

In wolfSSL's EVP layer, the ChaCha20-Poly1305 AEAD decryption path in wolfSSL_EVP_CipherFinal (and related EVP cipher finalization functions) fails to verify the authentication tag before returning plaintext to the caller. When an application uses the EVP API to perform ChaCha20-Poly1305 decryption, the implementation computes or accepts the tag but does not compare it against the expected value.

The weakness was published by Calif.io. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-5479 since 04/03/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 305897 (Linux Distros Unpatched Vulnerability : CVE-2026-5479), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.9.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (305897). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

wolfSSL

Version

License

open-source

Website

Product: https://github.com/wolfSSL/wolfssl/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integrity check
CWE: CWE-354 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 305897
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-5479

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: wolfSSL 5.9.1
Patch: github.com

Timelineinfo

04/03/2026 CVE reserved
04/10/2026 +7 days Advisory disclosed
04/10/2026 +0 days VulDB entry created
04/11/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Calif.io
Status: Confirmed

CVE: CVE-2026-5479 (🔒)
GCVE (CVE): GCVE-0-2026-5479
GCVE (VulDB): GCVE-100-356720

Entryinfo

Created: 04/10/2026 06:25
Updated: 04/11/2026 01:12
Changes: 04/10/2026 06:25 (68), 04/11/2026 01:12 (2)
Complete: 🔍
Cache ID: 216:9E4:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.