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CVE-2026-59877

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.5 and 8.6.6, protobufjs parsed option names by advancing through schema tokens until reaching an = token without checking for end of input, so a crafted .proto schema that opens an option declaration and ends prematurely can cause parse, Root.load, or Root.loadSync to loop indefinitely. This issue is fixed in versions 7.6.5 and 8.6.6.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cf77ac9a5ae59d2dd92f94635a2a05cdc1c62cebee282f94099f5e33c07be94e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"protobuf.js","vendor":"protobufjs","versions":[{"status":"affected","version":">= 7.5.0, < 7.6.5"},{"status":"affected","version":">= 8.0.0, < 8.6.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-835","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"https://github.com/protobufjs/protobuf.js/commit/10fba6d54815ceecca8a06b9a6db490c8f5d2217","tags":["x_refsource_MISC"],"url":"https://github.com/protobufjs/protobuf.js/commit/10fba6d54815ceecca8a06b9a6db490c8f5d2217"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/references/2
{"name":"https://github.com/protobufjs/protobuf.js/commit/fa5c73add738ceb471e74da8cc2f3727c3d0a69f","tags":["x_refsource_MISC"],"url":"https://github.com/protobufjs/protobuf.js/commit/fa5c73add738ceb471e74da8cc2f3727c3d0a69f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/references/3
{"name":"https://github.com/protobufjs/protobuf.js/pull/2352","tags":["x_refsource_MISC"],"url":"https://github.com/protobufjs/protobuf.js/pull/2352"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/references/1
{"name":"https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.6.5","tags":["x_refsource_MISC"],"url":"https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.6.5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/references/4
{"name":"https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.6.6","tags":["x_refsource_MISC"],"url":"https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.6.6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/references/5
{"name":"https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-j3f2-48v5-ccww","tags":["x_refsource_CONFIRM"],"url":"https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-j3f2-48v5-ccww"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a1463af50076ad77f40c68150a50ad8e79fc5baaaaccdd14fe3741aa1847380 · sha256:ec6fc307e336a52c… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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