CVE-2026-34221 describes a high-severity prototype pollution vulnerability in MikroORM, a TypeScript ORM, affecting versions prior to 6.6.10 and 7.0.6. Rated 8.3 HIGH (CVSS), this flaw allows an unauthenticated attacker with low attack complexity to modify the JavaScript object prototype via specially crafted input to the Utils.merge helper, potentially leading to high impact on integrity and availability. There is no evidence of active exploitation or public exploit code, though the vulnerability has generated some community discussion, indicating awareness within the security community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.6.10CPE matchmatch criteria | cpe:2.3:a:mikro-orm:mikroorm:*:*:*:*:*:node.js:*:* | ||
>= 7.0.0, < 7.0.6CPE matchmatch criteria | cpe:2.3:a:mikro-orm:mikroorm:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.