218 lines
8.7 KiB
JSON
218 lines
8.7 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-2026-93838",
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"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"state": "PUBLISHED",
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"assignerShortName": "VulnCheck",
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"dateReserved": "2026-09-18T18:16:36.587Z",
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"datePublished": "2026-09-18T19:06:03.899Z",
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"dateUpdated": "2026-09-24T14:23:13.073Z"
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},
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"containers": {
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"dateUpdated": "2026-09-24T14:23:13.073Z"
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},
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"datePublic": "2026-09-16T00:00:00.000Z",
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"title": "SGLang through 0.5.20 Unbounded Memory Allocation via STAGING_REQ chunk_idx",
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"descriptions": [
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{
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"lang": "en",
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"value": "SGLang versions through 0.5.20 contain an unbounded memory allocation vulnerability in handle_staging_req() that fails to validate chunk_idx from ZMQ STAGING_REQ frames in prefill/decode disaggregation deployments. Attackers with access to the decode engine's internal ZMQ rank port can send a frame with an extremely large chunk_idx value, causing the scheduler to allocate memory until the system runs out and terminates the process."
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"description": "Allocation of Resources Without Limits or Throttling",
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"cweId": "CWE-770",
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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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"affected": [
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{
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"vendor": "sgl-project",
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"product": "sglang",
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"packageURL": "pkg:pypi/sglang",
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"repo": "https://github.com/sgl-project/sglang",
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"collectionURL": "https://pypi.org/project/sglang",
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"defaultStatus": "unaffected",
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"versions": [
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{
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"version": "0",
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"status": "affected",
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"versionType": "semver",
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"lessThanOrEqual": "0.5.20"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*",
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"versionEndIncluding": "0.5.20"
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}
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]
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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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"format": "CVSS",
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"cvssV4_0": {
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"version": "4.0",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"baseScore": 8.2,
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"baseSeverity": "HIGH"
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}
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},
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{
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"format": "CVSS",
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"attackVector": "NETWORK",
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"attackComplexity": "HIGH",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"availabilityImpact": "HIGH",
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"baseScore": 5.9,
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"baseSeverity": "MEDIUM"
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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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"url": "https://github.com/sgl-project/sglang/issues/39764",
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"tags": [
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"issue-tracking"
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],
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"name": "GitHub Issue #39764"
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},
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{
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"url": "https://github.com/sgl-project/sglang",
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"tags": [
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"product"
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]
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},
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{
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"url": "https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/common/staging_handler.py#L781",
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"tags": [
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"technical-description"
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]
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},
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{
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"url": "https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/common/staging_handler.py#L848-L860",
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"tags": [
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"technical-description"
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]
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},
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{
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"url": "https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/common/conn.py#L1636-L1640",
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"tags": [
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"technical-description"
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]
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},
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{
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"name": "VulnCheck Advisory: SGLang through 0.5.20 Unbounded Memory Allocation via STAGING_REQ chunk_idx",
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"tags": [
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"third-party-advisory"
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],
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"url": "https://www.vulncheck.com/advisories/sglang-through-0.5.20-unbounded-memory-allocation-via-staging-req-chunk-idx"
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "Jiapeng Li",
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"type": "finder"
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},
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{
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"lang": "en",
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"value": "Mingkai Yu",
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"type": "finder"
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},
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{
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"lang": "en",
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"value": "Jiajia Liu",
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"type": "finder"
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}
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],
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"x_generator": {
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"engine": "vulncheck-endgame"
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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/sgl-project/sglang/issues/39764",
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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": "2026-09-18T20:09:38.130553Z",
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"id": "CVE-2026-93838",
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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": "2026-09-18T20:09:44.508Z"
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}
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}
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]
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}
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} |