Answer in brief
CVE-2026-48804 records a High severity security vulnerability in python-socketio: Binary attachment accumulation can cause denial of service. The source record does not mark it as known exploited. 1 affected package is mapped in the feed.
Answer in brief
CVE-2026-48804 records a High severity security vulnerability in python-socketio: Binary attachment accumulation can cause denial of service. The source record does not mark it as known exploited. 1 affected package is mapped in the feed.
Update python-socketio to 5.16.2 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanVulnerability describes the vulnerability class recorded for this advisory. The current record does not mark CVE-2026-48804 as known exploited; continue to monitor the source for status changes. The feed includes package mappings that can be checked against lockfiles and deployed manifests.
| Package | Affected range | Fixed version |
|---|---|---|
| python-socketiopip | <=5.16.1 | 5.16.2 |
Fixed versions are reported by the source feed; confirm compatibility before updating.
### Impact The python-socketio server stores binary `EVENT` and `ACK` messages in memory while it waits to receive their binary attachments. Once all the attachments are received, these messages are then processed. An attacker can submit a binary message and intentionally omit sending one or more of its attachments to cause the message along with the partial list of received attachments to stay in memory for a long time. ### Patches Version 5.16.2 takes the following measures to address this issue: - Binary packets are only accepted from authenticated clients. - When a client disconnects, the server checks if there is a partial binary message being held for the client and deletes it.
Reported by GitHub Security Advisories (ghsa).
CVE-2026-48804 records a High severity security vulnerability in python-socketio: Binary attachment accumulation can cause denial of service. The source record does not mark it as known exploited. 1 affected package is mapped in the feed.
The source record does not mark it as known exploited.
Check lockfiles and deployed manifests for python-socketio.
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL GuardUpdate python-socketio to 5.16.2 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanVulnerability describes the vulnerability class recorded for this advisory. The current record does not mark CVE-2026-48804 as known exploited; continue to monitor the source for status changes. The feed includes package mappings that can be checked against lockfiles and deployed manifests.
| Package | Affected range | Fixed version |
|---|---|---|
| python-socketiopip | <=5.16.1 | 5.16.2 |
Fixed versions are reported by the source feed; confirm compatibility before updating.
### Impact The python-socketio server stores binary `EVENT` and `ACK` messages in memory while it waits to receive their binary attachments. Once all the attachments are received, these messages are then processed. An attacker can submit a binary message and intentionally omit sending one or more of its attachments to cause the message along with the partial list of received attachments to stay in memory for a long time. ### Patches Version 5.16.2 takes the following measures to address this issue: - Binary packets are only accepted from authenticated clients. - When a client disconnects, the server checks if there is a partial binary message being held for the client and deletes it.
Reported by GitHub Security Advisories (ghsa).
CVE-2026-48804 records a High severity security vulnerability in python-socketio: Binary attachment accumulation can cause denial of service. The source record does not mark it as known exploited. 1 affected package is mapped in the feed.
The source record does not mark it as known exploited.
Check lockfiles and deployed manifests for python-socketio.
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard