CVE-2026-44291HIGH 8.1EPSS p27.4%

CVE-2026-44291CVE-2026-44291

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This could cause attacker-controlled strings to be emitted into generated JavaScript code. This vulnerability is fixed in 7.5.6 and 8.0.2.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.36% probability of exploitation · percentile 27.4% · 2026-06-18T12:00:27Z
Published2026-05-13
Last modified2026-05-14

Underlying weaknesses· 1

CWE-94

References

  1. https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-75px-5xx7-5xc7

1

TypeTargetConfidenceTier
WeaknessImproper Control of Generation of Code ('Code Injection')cwe-940%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-41242
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CVE-2026-44293
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CVE-2026-44295
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CVE-2026-46509
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CVE-2026-28794
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CVE-2026-45302
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.