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CVE-2026-59827

Deserialization of Untrusted Data: Is CVE-2026-59827 real, exploitable, or a false positive? Here's the community verdict.

signals

public sources

Exploited in wild
Not listed
CISA KEV
Public exploit
PoC (unverified)
Metasploit/EDB/PoC
Base severity
9.9 Critical
CVSS
Exploitation prob.
0.5%
FIRST EPSS
Weakness
CWE-502 · Deserialization of Untrusted Data
CWE

High CVSS base score, but low real-world exploitation probability (EPSS). Likely less urgent than the score implies.

public exploits

links to sources — we don’t host code

Unverified proof-of-concept code has been published. It may or may not be functional — assess before relying on it.

baseline read

auto · not a community verdict

Real, but low real-world risk

A genuine vulnerability on paper, but EPSS shows little real-world exploitation — the base score may overstate urgency. This is not the same as a false positive.

Based on CVSS · FIRST EPSS

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CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Metabase is an open-source business intelligence and embedded analytics tool. Prior to 1.58.15, 1.59.12, 1.60.6.3, and 1.61.1.4, Metabase instances with an H2 database connection, including the default sample database, deserialize arbitrary Java objects returned in H2 native query result columns of type OTHER without validation, allowing an authenticated user who can run native H2 queries to execute code on the Metabase server. This issue is fixed in versions 1.58.15, 1.59.12, 1.60.6.3, and 1.61.1.4.

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In your experience, is this finding real and exploitable?

awaiting field verdicts
Real, but not a risk here
Not a real issue

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    Same weakness: CWE-502 · Deserialization of Untrusted Data.