CVE-2026-12481Public exploitNetwork attack vector

Code execution via fail-open Lambda deserialization

Published Jul 3, 2026 · Updated Jul 3, 2026

Unsafe Lambda deserialization in Keras before 3.12.3 and 3.13.0 through 3.14.1 allows attackers to execute code via crafted configurations. Lambda.from_config treats an unset safe_mode value as false outside SafeModeScope, so func_load accepts attacker-controlled marshalled bytecode. A victim process must deserialize the crafted Lambda configuration through an affected direct or legacy call path; successful exploitation runs OS-level code with that process's privileges.

CVSS severity9.8
Critical
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unsafe Lambda deserialization in Keras before 3.12.3 and 3.13.0 through 3.14.1 allows attackers to execute code via crafted configurations. Lambda.from_config treats an unset safe_mode value as false outside SafeModeScope, so func_load accepts attacker-controlled marshalled bytecode. A victim process must deserialize the crafted Lambda configuration through an affected direct or legacy call path; successful exploitation runs OS-level code with that process's privileges.

The record

CVE
CVE-2026-12481
Published
Jul 3, 2026
Updated
Jul 3, 2026
Vendor
Keras
Product
Keras
Classifications
CWE-502, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=latest

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Keras · Kerasversion=unspecified <=latest

Published CVSS scores

8.8huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002User Execution Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo