140 lines
6.1 KiB
JSON
140 lines
6.1 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-2026-52732",
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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": "2026-06-08T14:00:43.572Z",
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"datePublished": "2026-08-18T19:26:07.345Z",
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"dateUpdated": "2026-08-18T19:32:31.103Z"
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},
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"containers": {
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"cna": {
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"title": "ZEBRA: Mempool transaction admission denial via single-peer inbound queue saturation",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-770",
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"lang": "en",
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"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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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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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "LOW",
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"baseScore": 5.3,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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"version": "3.1"
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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/ZcashFoundation/zebra/security/advisories/GHSA-4fc2-h7jh-287c",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-4fc2-h7jh-287c"
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},
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{
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"name": "https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd"
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},
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{
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"name": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0"
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}
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],
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"affected": [
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{
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"vendor": "ZcashFoundation",
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"product": "zebra",
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"versions": [
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{
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"version": "< 4.5.0",
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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": "2026-08-18T19:26:07.345Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, one unauthenticated P2P peer can monopolize all 25 MAX_INBOUND_CONCURRENCY slots in Zebra's inbound mempool download and verification pipeline. In zebrad/src/components/mempool/downloads.rs, the bounded queue was shared globally without per-peer accounting, while peer identity was not carried through Gossip and FullQueue responses were mapped to Response::Nil instead of reaching overload disconnection handling. An attacker can advertise fake transaction identifiers and remain silent so each task holds a slot until TRANSACTION_DOWNLOAD_TIMEOUT, then periodically refill the queue as slots expire. While saturated, honest peer transactions and local sendrawtransaction requests are rejected with MempoolError::FullQueue, although block validation and synchronization continue. This issue is fixed in version 4.5.0."
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}
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],
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"source": {
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"advisory": "GHSA-4fc2-h7jh-287c",
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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/ZcashFoundation/zebra/security/advisories/GHSA-4fc2-h7jh-287c",
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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": "2026-08-18T19:32:12.651849Z",
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"id": "CVE-2026-52732",
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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": "yes"
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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": "2026-08-18T19:32:31.103Z"
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}
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}
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]
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}
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} |