CVE-2026-42154

Highest-risk unexploited with PoCs

Exploit code exists, no confirmed in-the-wild activity, ranked by EPSS

Actively Exploited

Confirmed exploited in the wild, sorted by most recently updated

CVSS 7.5EPSS <1%

Published 2026-05-04Updated 2026-05-15

PoC

Vulnerability details

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNAGitHub_M

EPSS score history

Sources

4 links

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CVE Organization GitHub Security Advisories NVD Analysis RedHat Vuln DB

Profile

CVSS

7.5

EPSS

<1%

Published

2026-05-04

Updated

2026-05-15

CNA

GitHub_M

Vendors

prometheus

1 product

CPEs

cpe:/a:redhat:acm:2.13::el9

cpe:/a:redhat:hummingbird:1

cpe:/a:redhat:openshift_file_integrity_operator:1

cpe:/a:redhat:logging:6

cpe:/a:redhat:multicluster_globalhub

cpe:/a:redhat:network_observ_optr:1

cpe:/a:redhat:openshift_lightspeed

cpe:/a:redhat:acm:2

cpe:/a:redhat:ceph_storage:5

cpe:/a:redhat:ceph_storage:6

cpe:/a:redhat:ceph_storage:7

cpe:/a:redhat:ceph_storage:8

cpe:/a:redhat:ceph_storage:9

cpe:/a:redhat:edge_manager:1

cpe:/o:redhat:enterprise_linux:10

cpe:/o:redhat:enterprise_linux:7

cpe:/o:redhat:enterprise_linux:8

cpe:/o:redhat:enterprise_linux:9

cpe:/a:redhat:openshift_ai

cpe:/a:redhat:openshift:4

cpe:/a:redhat:openshift_gitops:1

cpe:/a:redhat:quay:3

cpe:/a:redhat:trusted_artifact_signer:1

cpe:/a:redhat:service_mesh:2

cpe:/a:redhat:service_mesh:3

cpe:/a:redhat:openstack:18.0

cpe:/o:redhat:enterprise_linux:10.2

cpe:/a:redhat:enterprise_linux:9::appstream

cpe:/a:redhat:logging:6.4::el9

cpe:/a:redhat:edge_manager:1.0::el9

cpe:/a:redhat:openshift:4.22::el9

cpe:/a:redhat:enterprise_linux:9

cpe:/a:redhat:edge_manager:1.1::el9

cpe:/a:redhat:quay:3.9::el8

cpe:/a:redhat:trusted_artifact_signer:1.3::el9

cpe:/a:redhat:edge_manager:1.1::el10

cpe:/a:redhat:edge_manager:1.1:el9

cpe:/a:redhat:multicluster_globalhub:1.4::el9

cpe:/a:redhat:quay:3.10::el8

cpe:/a:redhat:quay:3.16::el9

cpe:/a:redhat:openshift:4.21::el9

cpe:/a:redhat:quay:3.12::el8

cpe:/a:redhat:multicluster_globalhub:1.5::el9

cpe:/a:redhat:quay:3.15::el8

cpe:/a:redhat:multicluster_globalhub:1.6::el9

cpe:/a:redhat:multicluster_globalhub:1.7::el9

cpe:/a:redhat:openshift:4.20::el9

cpe:/a:redhat:logging:6.2::el9

cpe:/a:redhat:openshift:4.19::el9

cpe:/a:redhat:logging:6.0::el9

cpe:/a:redhat:openshift:4.17::el9

cpe:/a:redhat:openshift:4.18::el9

cpe:/o:redhat:enterprise_linux_eus:10.0

cpe:/a:redhat:rhel_e4s:9.4

cpe:/a:redhat:rhel_eus:9.6

cpe:/a:redhat:openshift_file_integrity_operator:1::el9

cpe:/a:redhat:openshift:4.16::el9

cpe:/a:redhat:logging:6.5::el9

cpe:/a:redhat:openshift:4.14::el9

cpe:/a:redhat:acm:2.17::el9

cpe:/a:redhat:openshift:4.15::el9

cpe:/a:redhat:openshift:4.12::el9

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