CVE-2026-90878 (GCVE-0-2026-90878)
Vulnerability from cvelistv5 – Published: 2026-09-15 04:15 – Updated: 2026-09-15 13:54
VLAI
EPSS
VEX
Title
vllm-project vLLM Jinja Template Rendering completions resource consumption
Summary
A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 13:41 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/403472 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/403472/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-90878 | third-party-advisory |
| https://vuldb.com/submit/927901 | third-party-advisory |
| https://github.com/vllm-project/vllm/issues/52025 | exploitissue-tracking |
| https://github.com/vllm-project/vllm/pull/52163 | issue-trackingpatch |
| https://github.com/vllm-project/vllm/ | product |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| vllm-project | vLLM |
Affected:
0.27.0
Affected: 0.27.1 cpe:2.3:a:vllm-project:vllm:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-90878",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-15T13:41:58.979010Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T13:54:06.533Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:vllm-project:vllm:*:*:*:*:*:*:*:*"
],
"modules": [
"Jinja Template Rendering"
],
"product": "vLLM",
"vendor": "vllm-project",
"versions": [
{
"status": "affected",
"version": "0.27.0"
},
{
"status": "affected",
"version": "0.27.1"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Zyz3366 (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 4,
"vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-404",
"description": "Denial of Service",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T04:15:11.051Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-403472 | vllm-project vLLM Jinja Template Rendering completions resource consumption",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/403472"
},
{
"name": "VDB-403472 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/403472/cti"
},
{
"name": "CVE-2026-90878 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-90878"
},
{
"name": "Submit #927901 | vLLM Project vLLM 0.27.1 Asymmetric Resource Consumption",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/927901"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/vllm-project/vllm/issues/52025"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/vllm-project/vllm/pull/52163"
},
{
"tags": [
"product"
],
"url": "https://github.com/vllm-project/vllm/"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-09-14T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-09-14T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-09-14T09:21:37.000Z",
"value": "VulDB entry last update"
}
],
"title": "vllm-project vLLM Jinja Template Rendering completions resource consumption",
"x_generator": [
"VulDB PVTS v202609"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-90878",
"datePublished": "2026-09-15T04:15:11.051Z",
"dateReserved": "2026-09-14T07:16:13.062Z",
"dateUpdated": "2026-09-15T13:54:06.533Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-90878",
"date": "2026-09-15",
"epss": "0.00303",
"percentile": "0.22896"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-90878\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-09-15T05:16:59.420\",\"lastModified\":\"2026-09-15T14:37:14.523\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.\"}],\"affected\":[{\"source\":\"cna@vuldb.com\",\"affectedData\":[{\"vendor\":\"vllm-project\",\"product\":\"vLLM\",\"cpes\":[\"cpe:2.3:a:vllm-project:vllm:*:*:*:*:*:*:*:*\"],\"modules\":[\"Jinja Template Rendering\"],\"versions\":[{\"version\":\"0.27.0\",\"status\":\"affected\"},{\"version\":\"0.27.1\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":2.1,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:N/I:N/A:P\",\"baseScore\":4.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-09-15T13:41:58.979010Z\",\"id\":\"CVE-2026-90878\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"},{\"lang\":\"en\",\"value\":\"CWE-404\"}]}],\"references\":[{\"url\":\"https://github.com/vllm-project/vllm/\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/vllm-project/vllm/issues/52025\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/vllm-project/vllm/pull/52163\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/cve/CVE-2026-90878\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/submit/927901\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/403472\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/403472/cti\",\"source\":\"cna@vuldb.com\"}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-15T04:54:30+00:00",
"cve": "CVE-2026-90878",
"id": "CVE-2026-90878",
"initial_release_date": "2026-09-15T04:15:11.051000+00:00",
"product_status:known_affected": "27",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "vllm: vLLM: Denial of Service via Jinja Template Rendering",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90878.json",
"version": "3"
},
"vulnrichment": {
"containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-09-15T04:15:11.051Z\"}, \"title\": \"vllm-project vLLM Jinja Template Rendering completions resource consumption\", \"problemTypes\": [{\"descriptions\": [{\"type\": \"CWE\", \"cweId\": \"CWE-400\", \"lang\": \"en\", \"description\": \"Resource Consumption\"}]}, {\"descriptions\": [{\"type\": \"CWE\", \"cweId\": \"CWE-404\", \"lang\": \"en\", \"description\": \"Denial of Service\"}]}], \"affected\": [{\"vendor\": \"vllm-project\", \"product\": \"vLLM\", \"versions\": [{\"version\": \"0.27.0\", \"status\": \"affected\"}, {\"version\": \"0.27.1\", \"status\": \"affected\"}], \"cpes\": [\"cpe:2.3:a:vllm-project:vllm:*:*:*:*:*:*:*:*\"], \"modules\": [\"Jinja Template Rendering\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 5.3, \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P\", \"baseSeverity\": \"MEDIUM\"}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 4.3, \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R\", \"baseSeverity\": \"MEDIUM\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 4.3, \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R\", \"baseSeverity\": \"MEDIUM\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 4, \"vectorString\": \"AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR\"}}], \"timeline\": [{\"time\": \"2026-09-14T00:00:00.000Z\", \"lang\": \"en\", \"value\": \"Advisory disclosed\"}, {\"time\": \"2026-09-14T02:00:00.000Z\", \"lang\": \"en\", \"value\": \"VulDB entry created\"}, {\"time\": \"2026-09-14T09:21:37.000Z\", \"lang\": \"en\", \"value\": \"VulDB entry last update\"}], \"credits\": [{\"lang\": \"en\", \"value\": \"Zyz3366 (VulDB User)\", \"type\": \"reporter\"}, {\"lang\": \"en\", \"value\": \"VulDB CNA Team\", \"type\": \"coordinator\"}], \"references\": [{\"url\": \"https://vuldb.com/vuln/403472\", \"name\": \"VDB-403472 | vllm-project vLLM Jinja Template Rendering completions resource consumption\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/vuln/403472/cti\", \"name\": \"VDB-403472 | CTI Indicators (IOB, IOC, TTP, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/cve/CVE-2026-90878\", \"name\": \"CVE-2026-90878 | CVE Analysis and Report\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/927901\", \"name\": \"Submit #927901 | vLLM Project vLLM 0.27.1 Asymmetric Resource Consumption\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/vllm-project/vllm/issues/52025\", \"tags\": [\"exploit\", \"issue-tracking\"]}, {\"url\": \"https://github.com/vllm-project/vllm/pull/52163\", \"tags\": [\"issue-tracking\", \"patch\"]}, {\"url\": \"https://github.com/vllm-project/vllm/\", \"tags\": [\"product\"]}], \"x_generator\": [\"VulDB PVTS v202609\"]}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-90878\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-15T13:41:58.979010Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-15T13:41:59.930Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-90878\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"VulDB\", \"dateReserved\": \"2026-09-14T07:16:13.062Z\", \"datePublished\": \"2026-09-15T04:15:11.051Z\", \"dateUpdated\": \"2026-09-15T13:54:06.533Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…