CVE-2026-44293Network attack vectorHinoki check available

Arbitrary JavaScript execution via unsafe bytes defaults

Published May 13, 2026 · Updated Aug 28, 2026

Code injection in protobuf.js before 7.5.6 and 8.0.0 through 8.0.1 allows attackers to execute arbitrary JavaScript. Generated toObject code embeds a non-string bytes-field default as an unsafe expression instead of safely encoding it as data. Exploitation requires an application to load an attacker-controlled descriptor and call toObject with defaults enabled; trusted schemas are not directly affected.

CVSS severity8.8
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Code injection in protobuf.js before 7.5.6 and 8.0.0 through 8.0.1 allows attackers to execute arbitrary JavaScript. Generated toObject code embeds a non-string bytes-field default as an unsafe expression instead of safely encoding it as data. Exploitation requires an application to load an attacker-controlled descriptor and call toObject with defaults enabled; trusted schemas are not directly affected.

The record

CVE
CVE-2026-44293
Published
May 13, 2026
Updated
Aug 28, 2026
Vendor
389 Directory Server
Product
Red Hat OpenShift AI
Classifications
CWE-94
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat OpenShift AIAffected versions are unavailable in this record.
389 Directory Server · Red Hat Developer HubAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux AIAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Data FoundationAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.21Affected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.18Affected versions are unavailable in this record.
protobufjs · protobuf.jsversion=< 7.5.6; version=>= 8.0.0, < 8.0.2
389 Directory Server · Red Hat Ansible Automation PlatformAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.19Affected versions are unavailable in this record.
389 Directory Server · Red Hat build of Podman DesktopAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.22Affected versions are unavailable in this record.
389 Directory Server · Self-service automation portalAffected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Service Mesh 3.3Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4Affected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4.20Affected versions are unavailable in this record.

Published CVSS scores

7.7GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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