CVE-2026-5188

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Source
https://cve.org/CVERecord?id=CVE-2026-5188
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5188.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-5188
Downstream
Published
2026-04-10T03:24:21.126Z
Modified
2026-08-12T03:51:47.445882896Z
Severity
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Integer underflow in X.509 SAN parsing in wolfSSL
Details

An integer underflow issue exists in wolfSSL when parsing the Subject Alternative Name (SAN) extension of X.509 certificates. A malformed certificate can specify an entry length larger than the enclosing sequence, causing the internal length counter to wrap during parsing. This results in incorrect handling of certificate data. The issue is limited to configurations using the original ASN.1 parsing implementation which is off by default.

Database specific 
{
    "cna_assigner": "wolfSSL",
    "cwe_ids": [
        "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5188.json"
}
References

Affected packages

Git / github.com/wolfssl/wolfssl

Affected ranges

Type
GIT
Repo
https://github.com/wolfssl/wolfssl
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1d363f3adceba9d1478230ede476a37b0dcdef24
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "5.9.0"
        },
        {
            "fixed": "5.9.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

Other
WCv4-rng-stable
l
list
wolfEntropy1
wolfEntropy2d
WCv5.*
WCv5.0-RC10
WCv5.0-RC11
WCv5.0-RC12
WCv5.0-RC9
v0.*
v0.5
v1.*
v1.8.8.0
v1.9.0
v2.*
v2.0.2
v2.0.3
v2.0.6
v2.0.8
v2.0rc1
v2.0rc2
v2.0rc2b
v2.0rc3
v2.4.2
v2.4.6
v2.4.7
v2.6.0
v2.6.2
v2.7.0
v2.7.2
v2.8.0
v2.8.2
v2.8.3
v2.8.4
v2.8.5
v2.8.5a
v2.8.6
v2.9.0
v2.9.1
v2.9.2
v2.9.4
v3.*
v3.10.0-stable
v3.10.0a
v3.10.2-stable
v3.10.3
v3.11.0-stable
v3.11.1-tls13-beta
v3.12.0-stable
v3.12.2-stable
v3.13.0-stable
v3.13.2
v3.13.3
v3.14.0-stable
v3.14.0a
v3.14.0b
v3.14.2
v3.14.4
v3.15.0-stable
v3.15.3-stable
v3.15.5-stable
v3.15.5a
v3.15.6
v3.15.7-stable
v3.2.0
v3.2.4
v3.2.6
v3.3.0
v3.3.3
v3.4.0
v3.4.2
v3.4.6
v3.6.8
v3.6.9
v3.7.0
v3.7.1
v3.7.3
v3.8.0
v3.9.0
v3.9.1
v3.9.10-stable
v3.9.10b
v3.9.6
v3.9.6w
v3.9.8
v4.*
v4.0.0-stable
v4.1.0-stable
v4.2.0-stable
v4.2.0c
v4.3.0-stable
v4.4.0-stable
v4.5.0-stable
v4.6.0-stable
v4.7.0-stable
v4.7.1r
v4.8.0-stable
v5.*
v5.0.0-stable
v5.1.0-stable
v5.2.0-stable
v5.2.1
v5.3.0-stable
v5.4.0-stable
v5.5.0-stable
v5.5.1-stable
v5.5.2-stable
v5.5.3-stable
v5.5.4-stable
v5.6.0-stable
v5.6.2-stable
v5.6.3-stable
v5.6.4-stable
v5.6.6-stable
v5.7.0-stable
v5.7.2-stable
v5.7.4-stable
v5.7.6-stable
v5.8.0-stable
v5.8.2-stable
v5.8.4-stable
v5.9.0-stable

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5188.json"