# protobufjs (npm) vulnerabilities Source: https://junglewise.ai/threats/technologies/protobufjs Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/protobufjs.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 17 vulnerabilities in protobufjs (npm): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-59876, was published on 20 July 2026. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 17 (1 critical, 0 exploited in the wild) ## About protobufjs (npm) JavaScript implementation of Protocol Buffers for serializing and deserializing structured data. ## Latest protobufjs (npm) vulnerabilities - [CVE-2026-59876: protobufjs prototype mutation in Text Format string map parsing](https://junglewise.ai/threats/cve-2026-59876-protobufjs-prototype-pollution-in-text-format-extension) (medium, CVSS 4.8, published 20 Jul 2026) - [CVE-2026-59877: protobufjs infinite loop in .proto option parsing](https://junglewise.ai/threats/cve-2026-59877-protobufjs-infinite-loop-in-proto-option-parsing) (medium, CVSS 5.3, published 8 Jul 2026) - [CVE-2026-54270: protobufjs memory amplification via unknown field preservation](https://junglewise.ai/threats/cve-2026-54270-protobufjs-memory-amplification-via-unknown-field-preservation) (medium, CVSS 5.3, published 22 Jun 2026) - [CVE-2026-54269: protobufjs property shadowing and uncontrolled recursion](https://junglewise.ai/threats/cve-2026-54269-protobufjs-property-shadowing-and-uncontrolled-recursion) (medium, CVSS 5.3, published 22 Jun 2026) - [CVE-2026-48712: protobufjs uncontrolled recursion in JSON conversion](https://junglewise.ai/threats/cve-2026-48712-protobufjs-uncontrolled-recursion-in-json-conversion) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-45740: protobufjs uncontrolled recursion in JSON descriptor expansion](https://junglewise.ai/threats/cve-2026-45740-protobufjs-uncontrolled-recursion-in-json-descriptor-expansion) (medium, CVSS 5.3, published 13 May 2026) - [CVE-2026-44293: protobufjs code injection in toObject function generation](https://junglewise.ai/threats/cve-2026-44293-protobufjs-code-injection-in-toobject-function-generation) (high, CVSS 8.8, published 13 May 2026) - [CVE-2026-44292: protobufjs prototype pollution in generated message constructors](https://junglewise.ai/threats/cve-2026-44292-protobuf-js-prototype-injection-in-generated-message-constructors) (medium, CVSS 5.3, published 13 May 2026) - [CVE-2026-44291: protobufjs code injection via prototype pollution in lookup tables](https://junglewise.ai/threats/cve-2026-44291-protobuf-js-code-injection-via-prototype-pollution-gadget) (high, CVSS 8.1, published 13 May 2026) - [CVE-2026-44290: protobufjs prototype pollution in schema option handling](https://junglewise.ai/threats/cve-2026-44290-protobufjs-prototype-pollution-in-schema-parsing) (high, CVSS 7.5, published 13 May 2026) - [CVE-2026-44289: protobufjs uncontrolled recursion in protobuf decoding](https://junglewise.ai/threats/cve-2026-44289-protobufjs-uncontrolled-recursion-in-protobuf-decoding) (high, CVSS 7.5, published 13 May 2026) - [CVE-2026-44288: protobufjs validation bypass via overlong UTF-8 sequences](https://junglewise.ai/threats/cve-2026-44288-protobufjs-validation-bypass-via-overlong-utf-8-sequences) (medium, CVSS 5.3, published 13 May 2026) - [CVE-2026-41242: protobufjs code injection in protobuf definitions](https://junglewise.ai/threats/cve-2026-41242-protobufjs-code-injection-in-protobuf-definitions) (critical, CVSS 9.8, published 18 Apr 2026) - [CVE-2023-36665: protobufjs Prototype Pollution via untrusted protobuf messages](https://junglewise.ai/threats/cve-2023-36665-protobufjs-prototype-pollution-via-untrusted-protobuf-messages) (low, CVSS 3.1, published 5 Jul 2023) - [CVE-2022-25878: protobufjs prototype pollution vulnerability](https://junglewise.ai/threats/cve-2022-25878-protobufjs-prototype-pollution-vulnerability) (low, CVSS 3.1, published 28 May 2022) - [protobufjs denial of service in message parser](https://junglewise.ai/threats/protobufjs-denial-of-service-in-message-parser-535484bb) (info, published 19 Aug 2020) - [CVE-2018-3738: protobufjs regular expression denial of service](https://junglewise.ai/threats/cve-2018-3738-protobufjs-regular-expression-denial-of-service) (low, CVSS 3.1, published 9 Oct 2018) ## Most severe protobufjs (npm) vulnerabilities - [CVE-2026-41242: protobufjs code injection in protobuf definitions](https://junglewise.ai/threats/cve-2026-41242-protobufjs-code-injection-in-protobuf-definitions) (critical, CVSS 9.8, published 18 Apr 2026) - [CVE-2026-44293: protobufjs code injection in toObject function generation](https://junglewise.ai/threats/cve-2026-44293-protobufjs-code-injection-in-toobject-function-generation) (high, CVSS 8.8, published 13 May 2026) - [CVE-2026-44291: protobufjs code injection via prototype pollution in lookup tables](https://junglewise.ai/threats/cve-2026-44291-protobuf-js-code-injection-via-prototype-pollution-gadget) (high, CVSS 8.1, published 13 May 2026) - [CVE-2026-44289: protobufjs uncontrolled recursion in protobuf decoding](https://junglewise.ai/threats/cve-2026-44289-protobufjs-uncontrolled-recursion-in-protobuf-decoding) (high, CVSS 7.5, published 13 May 2026) - [CVE-2026-44290: protobufjs prototype pollution in schema option handling](https://junglewise.ai/threats/cve-2026-44290-protobufjs-prototype-pollution-in-schema-parsing) (high, CVSS 7.5, published 13 May 2026) - [CVE-2026-48712: protobufjs uncontrolled recursion in JSON conversion](https://junglewise.ai/threats/cve-2026-48712-protobufjs-uncontrolled-recursion-in-json-conversion) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-59877: protobufjs infinite loop in .proto option parsing](https://junglewise.ai/threats/cve-2026-59877-protobufjs-infinite-loop-in-proto-option-parsing) (medium, CVSS 5.3, published 8 Jul 2026) - [CVE-2026-45740: protobufjs uncontrolled recursion in JSON descriptor expansion](https://junglewise.ai/threats/cve-2026-45740-protobufjs-uncontrolled-recursion-in-json-descriptor-expansion) (medium, CVSS 5.3, published 13 May 2026) - [CVE-2026-54270: protobufjs memory amplification via unknown field preservation](https://junglewise.ai/threats/cve-2026-54270-protobufjs-memory-amplification-via-unknown-field-preservation) (medium, CVSS 5.3, published 22 Jun 2026) - [CVE-2026-54269: protobufjs property shadowing and uncontrolled recursion](https://junglewise.ai/threats/cve-2026-54269-protobufjs-property-shadowing-and-uncontrolled-recursion) (medium, CVSS 5.3, published 22 Jun 2026) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other npm technologies - [openclaw (npm)](https://junglewise.ai/threats/technologies/npm-openclaw): 214 vulnerabilities - [flowise (npm)](https://junglewise.ai/threats/technologies/flowise): 133 vulnerabilities - [parse-server (npm)](https://junglewise.ai/threats/technologies/parse-server): 117 vulnerabilities - [vm2 (npm)](https://junglewise.ai/threats/technologies/vm2): 111 vulnerabilities - [electron (npm)](https://junglewise.ai/threats/technologies/electron): 77 vulnerabilities - [ghost (npm)](https://junglewise.ai/threats/technologies/ghost): 74 vulnerabilities - [n8n (npm)](https://junglewise.ai/threats/technologies/npm-n8n): 64 vulnerabilities - [hono (npm)](https://junglewise.ai/threats/technologies/hono): 62 vulnerabilities - [directus (npm)](https://junglewise.ai/threats/technologies/directus): 61 vulnerabilities - [nocodb (npm)](https://junglewise.ai/threats/technologies/nocodb): 54 vulnerabilities - [undici (npm)](https://junglewise.ai/threats/technologies/undici): 53 vulnerabilities - [@budibase/server (npm)](https://junglewise.ai/threats/technologies/budibase-server): 42 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "protobufjs (npm) vulnerabilities", https://junglewise.ai/threats/technologies/protobufjs, 13 November 2026.