How severe is CVE-2026-44293?

CVE-2026-44293 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-44293 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44293?

CVE-2026-44293 affects Protobufjs Project Protobufjs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44293?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-44293 have an EU (EUVD) identifier?

Yes. CVE-2026-44293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30031.

When was CVE-2026-44293 published?

CVE-2026-44293 was published on 2026-05-13 and last updated on 2026-07-02.

CVE-2026-44293

CVE-2026-44293 is a high-severity vulnerability in Protobufjs Project Protobufjs with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 7.7
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30031
Weakness: CWE-94
Affected product: Protobufjs Project Protobufjs
Published: 2026-05-13
Last modified: 2026-07-02

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.

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.
How severe is CVE-2026-44293?: CVE-2026-44293 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-44293 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44293?: CVE-2026-44293 affects Protobufjs Project Protobufjs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44293?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-44293 have an EU (EUVD) identifier?: Yes. CVE-2026-44293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30031.
When was CVE-2026-44293 published?: CVE-2026-44293 was published on 2026-05-13 and last updated on 2026-07-02.

References

Affected products (1)

cpe:2.3:a:protobufjs_project:protobufjs:*:*:*:*:*:node.js:*:*

More vulnerabilities in Protobufjs Project Protobufjs

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