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VulnerabilityPublished

CVE-2026-48712: protobufjs protobuf.js · Uncontrolled Recursion

Affects protobufjs protobuf.jsSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 8.4.1 or 7.6.1 soon.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 8.4.1, 7.6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade protobuf.js and protobufjs/protobuf.js to 8.4.1 or 7.6.1.

Affected software

ProductAffectedFixed in
protobufjsprotobuf.jsAffected
  • >=8.0.0 <8.4.1
Fixed in
  • 8.4.1
protobufjsprotobuf.jsAffected
  • <7.6.1
Fixed in
  • 7.6.1
npmprotobufjs/protobuf.jspkg:npm/protobufjs/protobuf.jsOther threatsAffected
  • <7.6.1
  • >=8.0.0 <8.4.1
Fixed in
  • 7.6.1
  • 8.4.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade protobuf.js to version 7.6.1 or later if using versions prior to 7.6.1, or to version 8.4.1 or later if using versions between 8.0.0 and before 8.4.1. These versions contain the fix for the uncontrolled recursion vulnerability. Patch status is confirmed by the version information in the advisory. No other mitigation is indicated.

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.1 and 8.4.1, protobufjs could recurse without a depth limit while converting decoded messages to plain objects or JSON. This affected generated toObject() conversion and the custom google.protobuf.Any JSON conversion path. A crafted protobuf binary payload containing deeply nested Any values could cause the JavaScript call stack to be exhausted during conversion to JSON. This vulnerability is fixed in 7.6.1 and 8.4.1.

References

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