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No exploitation reportedFix available

CVE-2026-44293

No exploitation reported by the sources we read.

  • Published2026-05-13
  • Fixed in8.0.2 · 7.5.6
  • WeaknessCWE-94

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.

Timeline

dates in UTC
  1. 2026-05-1316:16CVE publishedNVD

Versions per branch

NVD · OSV
Protobufjs project protobufjs
BranchAffectedFixed in
8.0≥ 8.0.0, < 8.0.28.0.2
7.5< 7.5.67.5.6

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • protobufjs protobuf.js
    Affected
    • = < 7.5.6no fix stated
    • = >= 8.0.0, < 8.0.2no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-05-13

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • @rootio/protobufjsRoot:npmall versions · fixed in 7.4.0-root.io.2
  • @rootio/protobufjsRoot:npmall versions · fixed in 6.11.2-root.io.1
  • @rootio/protobufjsRoot:npmall versions · fixed in 6.11.4-root.io.1
  • @rootio/protobufjsRoot:npmall versions · fixed in 6.11.4-root.io.2
  • @rootio/protobufjsRoot:npmall versions · fixed in 6.11.4-root.io.3
  • @rootio/protobufjsRoot:npmall versions · fixed in 6.11.4-root.io.4
  • @rootio/protobufjsRoot:npmall versions · fixed in 6.11.4-root.io.5
  • @rootio/protobufjsRoot:npmall versions · fixed in 6.11.6-root.io.1

121 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-44293 Red Hat Product Security69 products fixed · 14 known affected

    protobufjs: protobufjs: Arbitrary code execution due to unsafe expression generation from crafted protobuf descriptors

    rh-podman-desktop.git as a component of Red Hat Build of Podman Desktop · rhceph/alloy-rhel10 as a component of Red Hat Ceph Storage 9 · rhcl-1/rhcl-rhdh-dynamic-plugin-rhel9 as a component of Red Hat Connectivity Link 1 · +11 more

  • RHSA-2026:84734 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: RHOAI 3.4.5 - Red Hat OpenShift AI

  • RHSA-2026:60520 Red Hat Product Security28 products fixed

    Red Hat Security Advisory: RHOAI 3.4.4 - Red Hat OpenShift AI

  • RHSA-2026:57487 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.18.54 bug fix and security update

  • RHSA-2026:54555 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.19.43 bug fix and security update

  • RHSA-2026:37628 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.20.29 bug fix and security update

7 more advisories

Full record on NVD

Fix

  1. Update Protobufjs project protobufjs to 8.0.2 · 7.5.6
  2. Vendor fix Red Hat Product Security RHSA-2026:84734 · 4 productsFor Red Hat OpenShift AI 3.4.5 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.redhat.com/en/documentation/red_hat_openshift_ai/
  3. Vendor fix Red Hat Product Security RHSA-2026:60520 · 28 productsFor Red Hat OpenShift AI 3.4.4 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.redhat.com/en/documentation/red_hat_openshift_ai/
  4. Vendor fix Red Hat Product Security RHSA-2026:57487 · 4 productsFor OpenShift Container Platform 4.18 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  5. Vendor fix Red Hat Product Security RHSA-2026:54555 · 4 productsFor OpenShift Container Platform 4.19 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  6. Vendor fix Red Hat Product Security RHSA-2026:37628 · 4 productsFor OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  7. Vendor fix Red Hat Product Security RHSA-2026:37186 · 4 productsFor OpenShift Container Platform 4.21 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2026-05-14
  • CNACVSS 4.07.7known since 2026-10-23
  • CNACVSS 3.17.1known since 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • CNAweakness (CWE)CWE-94known since 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2026-05-12

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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
Published
2026-05-13
Last Modified
2026-09-09
NVD status
Modified
GitHub Advisory
GHSA-66ff-xgx4-vchm

Frequently asked questions

What is CVE-2026-44293?

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.

Is CVE-2026-44293 actively exploited?

Active exploitation of CVE-2026-44293 has not been confirmed. Its EPSS score was 0.4% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-44293?

CVE-2026-44293 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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