CVE-2026-27880VulnerabilityPublished 1 Apr 2026Updated 6 Jul 2026

BIT-grafana-2026-27880: OpenFeature evaluation API reads input data with no bounds

Affects grafanaSource GCVE Database

Not known to be exploited · fixed in 12.4.2 : patch grafana soon.

Data as of 26 Oct 2026, 10:12 UTC

Severity

High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 12.4.2, 12.3.6, 12.2.8 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade grafana to 12.4.2, 12.3.6, 12.2.8 or 12.1.10.

Affected software

Product	Affected	Fixed in
Bitnamigrafana`pkg:bitnami/grafana`Other threats	Affected >=12.1.0 <12.1.10 >=12.2.0 <12.2.8 >=12.3.0 <12.3.6 >=12.4.0 <12.4.2	Fixed in 12.1.10 12.2.8 12.3.6 12.4.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, consider limiting input sizes or applying resource limits to mitigate potential crashes.

Description

CVE-2026-27880 is a vulnerability in Grafana's OpenFeature feature toggle evaluation endpoint where unbounded input data is read into memory. This can lead to out-of-memory crashes, potentially causing denial of service. The issue affects multiple Grafana versions in the 12.x series prior to specific patch releases. No CVSS score is available, but the severity is assessed as high. The vulnerability is not related to a cloud service and no known exploits are reported in the wild.

Impact

Successful exploitation of this vulnerability can cause Grafana to crash due to out-of-memory conditions, resulting in denial of service. There is no indication of code execution or data leakage. No known exploits are currently reported in the wild.

Summary

The OpenFeature evaluation API in Grafana versions >=12.1.0 <12.1.10, >=12.2.0 <12.2.8, >=12.3.0 <12.3.6, and >=12.4.0 <12.4.2 reads input data without bounds into memory. This unbounded read can cause the application to consume excessive memory, leading to out-of-memory crashes. The vulnerability is categorized as high severity due to its potential to disrupt service availability. The vendor advisory referenced (Red Hat) does not contain explicit remediation details in the provided excerpt.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Jul 2026, 23:38 UTC

Technical details

References

Community reviews

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