CVE catalog
CVE-2026-42154
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
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.81% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | prometheus | sid | 3.5.3+ds1-6 | fixed |
| Debian | prometheus | forky | 3.5.3+ds1-6 | fixed |
| Debian | prometheus | trixie | 2.53.3+ds1-2 | vulnerable |
| Debian | prometheus | bookworm | 2.42.0+ds-5+deb12u1 | vulnerable |
| Cpe | prometheus | Not reported | Not reported | vulnerable |
| Cpe | prometheus | Not reported | 3.5.3 | fixed |
| Cpe | prometheus | Not reported | 3.11.3 | fixed |
| Go | github.com/prometheus/prometheus | Not reported | Not reported | unknown |
| Go | github.com/prometheus/prometheus | Not reported | 0.305.2 | fixed |
| Go | github.com/prometheus/prometheus | Not reported | Not reported | unknown |
| Go | github.com/prometheus/prometheus | Not reported | 0.311.3 | fixed |
| Go | github.com/prometheus/prometheus | Not reported | 0.305.2 | fixed |
| Go | github.com/prometheus/prometheus/v2 | Not reported | Not reported | unknown |
| Cpe | prometheus | Not reported | 3.11.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | prometheus | source | sid | 3.5.3+ds1-1 | not yet assigned | Not reported | [1135999] |
| Debian | prometheus | source | forky | 3.5.3+ds1-1 | not yet assigned | Not reported | [1135999] |
| Debian | prometheus | source | trixie | (unfixed) | not yet assigned | Not reported | [1135999] |
| Debian | prometheus | source | bookworm | (unfixed) | not yet assigned | Not reported | [1135999] |
| Cpe | prometheus | cpe | Not reported | 3.5.3 | Not reported | Not reported | Not reported |
| Cpe | prometheus | cpe | Not reported | 3.11.3 | Not reported | Not reported | Not reported |
| Go | github.com/prometheus/prometheus | Go | Not reported | 0.305.2 | Not reported | Not reported | Not reported |
| Go | github.com/prometheus/prometheus | Go | Not reported | 0.311.3 | Not reported | Not reported | Not reported |
| Go | github.com/prometheus/prometheus | Go | Not reported | 0.305.2 | Not reported | Not reported | Not reported |
| Cpe | prometheus | cpe | Not reported | 3.11.3 | Not reported | NVD-CVE-2026-42154 | Not reported |
Notes
[bookworm] prometheus: Minor issue, DoS
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [prometheus]Affected
Details (2)
2.42.0+ds-5+deb12u1· amd64 · bookwormAffected
nvd · prometheus · debian · bookworm; nvd · prometheus · debian · 12
2.42.0+ds-5+deb12u1· arm64 · bookwormAffected
nvd · prometheus · debian · bookworm; nvd · prometheus · debian · 12
[Debian 13 (Trixie)]
- [golang-github-prometheus-prometheus-dev]Affected
Source package: [prometheus]
Details (2)
2.53.3+ds1-2· all · trixieAffected
nvd · prometheus · debian · 13
2.53.3+ds1-2· all · trixieAffected
nvd · prometheus · debian · 13
- [prometheus]Affected
Details (2)
2.53.3+ds1-2· amd64 · trixieAffected
nvd · prometheus · debian · 13
2.53.3+ds1-2· arm64 · trixieAffected
nvd · prometheus · debian · 13
- [promtool]Affected
Source package: [prometheus]
Details (2)
2.53.3+ds1-2· amd64 · trixieAffected
nvd · prometheus · debian · 13
2.53.3+ds1-2· arm64 · trixieAffected
nvd · prometheus · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_34357.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42154]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-42154]
- [https://osv.dev/vulnerability/GHSA-8rm2-7qqf-34qm]
- [https://security-tracker.debian.org/tracker/CVE-2026-42154]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42154.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3046.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]