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vuln-cve/data/2026/5xxx/CVE-2026-5778.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-5778",
"assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
"state": "PUBLISHED",
"assignerShortName": "wolfSSL",
"dateReserved": "2026-04-08T08:25:15.400Z",
"datePublished": "2026-04-09T21:45:09.053Z",
"dateUpdated": "2026-04-10T13:53:29.181Z"
},
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"shortName": "wolfSSL",
"dateUpdated": "2026-04-09T21:45:09.053Z"
},
"title": "Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path.",
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"cweId": "CWE-191",
"description": "CWE-191 Integer underflow (wrap or wraparound)",
"type": "CWE"
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"affected": [
{
"vendor": "wolfSSL",
"product": "wolfSSL",
"modules": [
"Packet sniffer"
],
"programFiles": [
"src/sniffer.c"
],
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"status": "affected",
"version": "0",
"lessThanOrEqual": "5.9.0",
"versionType": "semver"
}
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"value": "Integer underflow in wolfSSL packet sniffer <= 5.9.0 allows an attacker to cause a program crash in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by ssl_DecodePacket. The underflow wraps a 16-bit length to a large value that is passed to AEAD decryption routines, causing a large out-of-bounds read and crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records.",
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"value": "Integer underflow in wolfSSL packet sniffer &lt;= 5.9.0 allows an attacker to cause a program crash in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by ssl_DecodePacket. The underflow wraps a 16-bit length to a large value that is passed to AEAD decryption routines, causing a large out-of-bounds read and crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records."
}
]
}
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"references": [
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"url": "https://github.com/wolfSSL/wolfssl/pull/10125"
}
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"value": "GENERAL"
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"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "LOW",
"userInteraction": "PASSIVE",
"vulnConfidentialityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"subIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "LOW",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "LOW",
"baseScore": 2.1,
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
}
}
],
"credits": [
{
"lang": "en",
"value": "Zou Dikai",
"type": "finder"
}
],
"source": {
"discovery": "EXTERNAL"
},
"x_generator": {
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"metrics": [
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"content": {
"timestamp": "2026-04-10T13:53:21.774876Z",
"id": "CVE-2026-5778",
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{
"Exploitation": "none"
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"Automatable": "no"
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"role": "CISA Coordinator",
"version": "2.0.3"
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],
"title": "CISA ADP Vulnrichment",
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