How severe is CVE-2026-48712?

CVE-2026-48712 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-48712 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-48712?

CVE-2026-48712 affects Protobufjs Project Protobufjs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-48712?

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-2026-48712 have an EU (EUVD) identifier?

Yes. CVE-2026-48712 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38306.

When was CVE-2026-48712 published?

CVE-2026-48712 was published on 2026-06-22 and last updated on 2026-06-26.

CVE-2026-48712

CVE-2026-48712 is a high-severity vulnerability in Protobufjs Project Protobufjs with a CVSS 3.x base score of 7.5. 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-674.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38306
Weakness: CWE-674
Affected product: Protobufjs Project Protobufjs
Published: 2026-06-22
Last modified: 2026-06-26

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.

Frequently asked questions

What is CVE-2026-48712?: 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.
How severe is CVE-2026-48712?: CVE-2026-48712 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-48712 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-48712?: CVE-2026-48712 affects Protobufjs Project Protobufjs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-48712?: 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-2026-48712 have an EU (EUVD) identifier?: Yes. CVE-2026-48712 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38306.
When was CVE-2026-48712 published?: CVE-2026-48712 was published on 2026-06-22 and last updated on 2026-06-26.

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-wcpc-wj8m-hjx6

Affected products (1)

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

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