Bug 2466505 (CVE-2026-42154) - CVE-2026-42154 github.com/prometheus/prometheus: Prometheus: Denial of Service via uncontrolled memory allocation in remote read endpoint
Summary: CVE-2026-42154 github.com/prometheus/prometheus: Prometheus: Denial of Servic...
Keywords:
Status: NEW
Alias: CVE-2026-42154
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2481305 2488937 2488939 2488940 2488941 2481306 2481307
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-04 19:02 UTC by OSIDB Bzimport
Modified: 2026-07-16 14:32 UTC (History)
57 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:34357 0 None None None 2026-07-01 18:36:08 UTC
Red Hat Product Errata RHSA-2026:34359 0 None None None 2026-07-01 19:21:03 UTC
Red Hat Product Errata RHSA-2026:36796 0 None None None 2026-07-08 15:50:52 UTC
Red Hat Product Errata RHSA-2026:41019 0 None None None 2026-07-16 14:32:31 UTC

Description OSIDB Bzimport 2026-05-04 19:02:42 UTC 
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.
Comment 3 errata-xmlrpc 2026-07-01 18:36:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:34357 https://access.redhat.com/errata/RHSA-2026:34357
Comment 4 errata-xmlrpc 2026-07-01 19:20:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:34359 https://access.redhat.com/errata/RHSA-2026:34359
Comment 8 errata-xmlrpc 2026-07-08 15:50:48 UTC 
This issue has been addressed in the following products:

  RHEM 1.0 for RHEL 9

Via RHSA-2026:36796 https://access.redhat.com/errata/RHSA-2026:36796
Comment 9 errata-xmlrpc 2026-07-16 14:32:27 UTC 
This issue has been addressed in the following products:

  RHEM 1.1 for RHEL 10
  RHEM 1.1 for RHEL 9

Via RHSA-2026:41019 https://access.redhat.com/errata/RHSA-2026:41019
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