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CVE-2026-27880 is a high-severity denial-of-service vulnerability in Grafana’s OpenFeature feature-toggle evaluation/validation endpoints. The affected endpoint reads unbounded user-supplied values into memory without enforcing adequate size limits. Because the endpoint accepts excessively large input and allocates memory accordingly, a remote attacker can trigger uncontrolled memory consumption that leads to out-of-memory crashes of the Grafana process. The issue affects Grafana versions prior to 12.4.2, 12.3.6, 12.2.8, 12.1.10, and 11.6.14.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity unauthenticated denial-of-service vulnerability in Grafana OpenFeature validation endpoints caused by unbounded user input being accepted into memory.
A critical or high-severity vulnerability addressed by Grafana in affected versions prior to 12.4.2, 12.3.6, 12.2.8, 12.1.10, and 11.6.14.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.