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GHSA-677m-j7p3-52f9

HighCVSS 8.7 / 10
Published Mar 18, 2026·Last modified Mar 23, 2026
Affected Components(0)

No affected components available

Description

Impact

A specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory.

Patches

| Version range | Used by | Fixed version | |------------------|--------------------------------------------|---------------| | >=4.0.0 <4.2.6 | socket.io@4.x and socket.io-client@4.x | 4.2.6 | | >=3.4.0 <3.4.4 | socket.io@2.x | 3.4.4 | | <3.3.5 | socket.io-client@2.x | 3.3.5 |

Workarounds

There is no known workaround except upgrading to a safe version.

For more information

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Risk Scores
Base Score
8.7

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
6.6

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.51%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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