| Name | CVE-2026-42154 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1135999 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| prometheus (PTS) | bullseye | 2.24.1+ds-1 | vulnerable |
| bookworm | 2.42.0+ds-5+deb12u1 | vulnerable |
| trixie | 2.53.3+ds1-2 | vulnerable |
| sid | 3.5.3+ds1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| prometheus | source | (unstable) | 3.5.3+ds1-1 | | | 1135999 |
Notes
[bookworm] - prometheus <postponed> (Minor issue, DoS)
[bullseye] - prometheus <postponed> (Minor issue, DoS)
https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm
https://github.com/prometheus/prometheus/pull/18584
https://github.com/prometheus/prometheus/pull/18585