136 lines
6.0 KiB
JSON
136 lines
6.0 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-49263",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-05-28T14:33:01.180Z",
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"datePublished": "2026-08-14T17:49:36.804Z",
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"dateUpdated": "2026-08-17T19:52:03.982Z"
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},
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"containers": {
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"cna": {
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"title": "Capstone WASM `br_table` instruction-size truncation can cause no-progress disassembly and parser desynchronization",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-197",
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"lang": "en",
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"description": "CWE-197: Numeric Truncation Error",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"privilegesRequired": "NONE",
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"userInteraction": "PASSIVE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "LOW",
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"vulnAvailabilityImpact": "LOW",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"baseScore": 2,
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"baseSeverity": "LOW",
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"vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
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"version": "4.0"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-5m9f-vqcm-g5pr",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-5m9f-vqcm-g5pr"
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},
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{
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"name": "https://github.com/capstone-engine/capstone/blob/251c5bb4bc9bb92973e738ae3c5f4ef86f103356/ChangeLog#L102",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/capstone-engine/capstone/blob/251c5bb4bc9bb92973e738ae3c5f4ef86f103356/ChangeLog#L102"
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}
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],
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"affected": [
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{
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"vendor": "capstone-engine",
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"product": "capstone",
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"versions": [
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{
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"version": "< 6.0.0-Alpha9",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-08-14T17:49:36.804Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Capstone is a disassembly framework. Prior to version 6.0.0-Alpha9, Capstone's WebAssembly backend accepts attacker-controlled raw WASM instruction bytes through the public `cs_disasm()` and `cs_disasm_iter()` APIs. For a large but well-formed `br_table` instruction, the WASM decoder accumulates the immediate length in a wider local variable but returns it through a `uint16_t` instruction-size path. When the encoded instruction length is exactly 65,536 bytes, the size wraps to zero and `cs_disasm()` can repeatedly decode the same instruction without advancing. For larger lengths, `cs_disasm_iter()` advances into the middle of the `br_table` payload and decodes target bytes as subsequent instructions. This is an availability and parser-integrity issue. Version 6.0.0-Alpha9 patches the issue."
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}
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],
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"source": {
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"advisory": "GHSA-5m9f-vqcm-g5pr",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-5m9f-vqcm-g5pr",
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"tags": [
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"exploit"
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]
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}
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],
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-08-17T19:51:57.796655Z",
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"id": "CVE-2026-49263",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-08-17T19:52:03.982Z"
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}
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}
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]
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}
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} |