How severe is CVE-2020-36049?

CVE-2020-36049 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-2020-36049 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36049?

CVE-2020-36049 affects Socket Socket.io-parser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36049?

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.

When was CVE-2020-36049 published?

CVE-2020-36049 was published on 2021-01-08 and last updated on 2026-06-17.

CVE-2020-36049

CVE-2020-36049 is a high-severity vulnerability in Socket Socket.io-parser 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-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Socket Socket.io-parser
Published: 2021-01-08
Last modified: 2026-06-17

Description

socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.

Frequently asked questions

What is CVE-2020-36049?: socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
How severe is CVE-2020-36049?: CVE-2020-36049 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-2020-36049 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36049?: CVE-2020-36049 affects Socket Socket.io-parser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36049?: 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.
When was CVE-2020-36049 published?: CVE-2020-36049 was published on 2021-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:socket:socket.io-parser:*:*:*:*:*:node.js:*:*

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