CVE-2026-42154 (GCVE-0-2026-42154)
Vulnerability from cvelistv5
Published
2026-05-04 18:13
Modified
2026-05-04 20:19
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| prometheus | prometheus |
Version: < 3.5.3 Version: >= 3.6.0, < 3.11.3 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-42154",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-04T20:18:48.754025Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-04T20:19:13.876Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "prometheus",
"vendor": "prometheus",
"versions": [
{
"status": "affected",
"version": "\u003c 3.5.3"
},
{
"status": "affected",
"version": "\u003e= 3.6.0, \u003c 3.11.3"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3."
}
],
"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-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-04T18:13:12.340Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm"
},
{
"name": "https://github.com/prometheus/prometheus/pull/18584",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/prometheus/prometheus/pull/18584"
},
{
"name": "https://github.com/prometheus/prometheus/pull/18585",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/prometheus/prometheus/pull/18585"
},
{
"name": "https://github.com/prometheus/prometheus/releases/tag/v3.11.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/prometheus/prometheus/releases/tag/v3.11.3"
},
{
"name": "https://github.com/prometheus/prometheus/releases/tag/v3.5.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/prometheus/prometheus/releases/tag/v3.5.3"
}
],
"source": {
"advisory": "GHSA-8rm2-7qqf-34qm",
"discovery": "UNKNOWN"
},
"title": "Prometheus: remote read endpoint allows denial of service via crafted snappy payload"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-42154",
"datePublished": "2026-05-04T18:13:12.340Z",
"dateReserved": "2026-04-24T17:15:21.835Z",
"dateUpdated": "2026-05-04T20:19:13.876Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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.
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