CVE-2026-63126 (GCVE-0-2026-63126)
Vulnerability from cvelistv5
Published
2026-09-16 18:13
Modified
2026-09-16 19:41
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-190 - Integer Overflow or Wraparound
Summary
Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.4.5 and 7.0.0-alpha04, Wire protobuf readers do not consistently validate attacker-controlled lengths against the current logical message boundary before advancing cursors, pointers, limits, slices, or allocations. In Kotlin, ProtoAdapter.decode(ByteArray) and ProtoAdapter.decode(ByteString) use ByteArrayProtoReader32.internalNextLengthDelimited(), where a positive oversized length can wrap pos + length to a negative limit and escape the existing negative-length check. Related ProtoReader, ReadBuffer.readVarint(), ReadBuffer.verifyAdditional(count:), packed-repeated, nested-message, and ProtoDecoder.decodeSizeDelimited(_:from:) paths can cross logical boundaries, perform pointer arithmetic, reserve capacity, or convert an unrepresentable size before proving the requested bytes exist. An attacker who supplies malformed protobuf bytes can cause unchecked exceptions, traps, out-of-bounds behavior, or excessive allocation, resulting in denial of service without known confidentiality, integrity, or code-execution impact. This issue is fixed in versions 6.4.5 and 7.0.0-alpha04.
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-63126",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-16T19:41:27.470490Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T19:41:42.146Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/square/wire/security/advisories/GHSA-9rm7-3qhh-h2mc"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "wire",
"vendor": "square",
"versions": [
{
"status": "affected",
"version": "\u003c 6.4.5"
},
{
"status": "affected",
"version": "\u003e= 7.0.0-alpha01, \u003c 7.0.0-alpha04"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.4.5 and 7.0.0-alpha04, Wire protobuf readers do not consistently validate attacker-controlled lengths against the current logical message boundary before advancing cursors, pointers, limits, slices, or allocations. In Kotlin, ProtoAdapter.decode(ByteArray) and ProtoAdapter.decode(ByteString) use ByteArrayProtoReader32.internalNextLengthDelimited(), where a positive oversized length can wrap pos + length to a negative limit and escape the existing negative-length check. Related ProtoReader, ReadBuffer.readVarint(), ReadBuffer.verifyAdditional(count:), packed-repeated, nested-message, and ProtoDecoder.decodeSizeDelimited(_:from:) paths can cross logical boundaries, perform pointer arithmetic, reserve capacity, or convert an unrepresentable size before proving the requested bytes exist. An attacker who supplies malformed protobuf bytes can cause unchecked exceptions, traps, out-of-bounds behavior, or excessive allocation, resulting in denial of service without known confidentiality, integrity, or code-execution impact. This issue is fixed in versions 6.4.5 and 7.0.0-alpha04."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-190",
"description": "CWE-190: Integer Overflow or Wraparound",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T18:13:33.197Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/square/wire/security/advisories/GHSA-9rm7-3qhh-h2mc",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/square/wire/security/advisories/GHSA-9rm7-3qhh-h2mc"
},
{
"name": "https://github.com/square/wire/pull/3635",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/square/wire/pull/3635"
},
{
"name": "https://github.com/square/wire/commit/082d5d83cec57ef68f1dd7d3e3d1d641c1fb670f",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/square/wire/commit/082d5d83cec57ef68f1dd7d3e3d1d641c1fb670f"
},
{
"name": "https://github.com/square/wire/commit/25ebcabb9ab7f12d1d77af75ecbc51726fddc015",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/square/wire/commit/25ebcabb9ab7f12d1d77af75ecbc51726fddc015"
},
{
"name": "https://github.com/square/wire/releases/tag/6.4.5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/square/wire/releases/tag/6.4.5"
},
{
"name": "https://github.com/square/wire/releases/tag/7.0.0-alpha04",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/square/wire/releases/tag/7.0.0-alpha04"
}
],
"source": {
"advisory": "GHSA-9rm7-3qhh-h2mc",
"discovery": "UNKNOWN"
},
"title": "Wire: Unauthenticated decoder crash via 32-bit length integer overflow in ByteArrayProtoReader32 (incomplete fix of CVE-2026-45799)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-63126",
"datePublished": "2026-09-16T18:13:33.197Z",
"dateReserved": "2026-07-15T16:54:55.816Z",
"dateUpdated": "2026-09-16T19:41:42.146Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"cna\": {\"title\": \"Wire: Unauthenticated decoder crash via 32-bit length integer overflow in ByteArrayProtoReader32 (incomplete fix of CVE-2026-45799)\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-190\", \"lang\": \"en\", \"description\": \"CWE-190: Integer Overflow or Wraparound\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/square/wire/security/advisories/GHSA-9rm7-3qhh-h2mc\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/square/wire/security/advisories/GHSA-9rm7-3qhh-h2mc\"}, {\"name\": \"https://github.com/square/wire/pull/3635\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/square/wire/pull/3635\"}, {\"name\": \"https://github.com/square/wire/commit/082d5d83cec57ef68f1dd7d3e3d1d641c1fb670f\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/square/wire/commit/082d5d83cec57ef68f1dd7d3e3d1d641c1fb670f\"}, {\"name\": \"https://github.com/square/wire/commit/25ebcabb9ab7f12d1d77af75ecbc51726fddc015\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/square/wire/commit/25ebcabb9ab7f12d1d77af75ecbc51726fddc015\"}, {\"name\": \"https://github.com/square/wire/releases/tag/6.4.5\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/square/wire/releases/tag/6.4.5\"}, {\"name\": \"https://github.com/square/wire/releases/tag/7.0.0-alpha04\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/square/wire/releases/tag/7.0.0-alpha04\"}], \"affected\": [{\"vendor\": \"square\", \"product\": \"wire\", \"versions\": [{\"version\": \"\u003c 6.4.5\", \"status\": \"affected\"}, {\"version\": \"\u003e= 7.0.0-alpha01, \u003c 7.0.0-alpha04\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-09-16T18:13:33.197Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.4.5 and 7.0.0-alpha04, Wire protobuf readers do not consistently validate attacker-controlled lengths against the current logical message boundary before advancing cursors, pointers, limits, slices, or allocations. In Kotlin, ProtoAdapter.decode(ByteArray) and ProtoAdapter.decode(ByteString) use ByteArrayProtoReader32.internalNextLengthDelimited(), where a positive oversized length can wrap pos + length to a negative limit and escape the existing negative-length check. Related ProtoReader, ReadBuffer.readVarint(), ReadBuffer.verifyAdditional(count:), packed-repeated, nested-message, and ProtoDecoder.decodeSizeDelimited(_:from:) paths can cross logical boundaries, perform pointer arithmetic, reserve capacity, or convert an unrepresentable size before proving the requested bytes exist. An attacker who supplies malformed protobuf bytes can cause unchecked exceptions, traps, out-of-bounds behavior, or excessive allocation, resulting in denial of service without known confidentiality, integrity, or code-execution impact. This issue is fixed in versions 6.4.5 and 7.0.0-alpha04.\"}], \"source\": {\"advisory\": \"GHSA-9rm7-3qhh-h2mc\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-63126\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-16T19:41:27.470490Z\"}}}], \"references\": [{\"url\": \"https://github.com/square/wire/security/advisories/GHSA-9rm7-3qhh-h2mc\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-16T19:41:37.069Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-63126\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-07-15T16:54:55.816Z\", \"datePublished\": \"2026-09-16T18:13:33.197Z\", \"dateUpdated\": \"2026-09-16T19:41:42.146Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…