CVE-2026-48804

HIGHPre-NVD 7.57.5
EchelonGraph scoreLOW confidence

This high-severity CVE scores 7.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:github_m
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

python-socketio: Binary attachment accumulation can cause denial of service

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.

CVSS v3
7.5
EG Score
7.5(low)
EPSS
—
KEV
Not listed

Published

June 26, 2026

Last Modified

June 26, 2026

Vendor Advisories for CVE-2026-48804(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 15× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 21:54 UTCEG score recompute
  2. 2026-07-06 11:01 UTCEG score recompute
  3. 2026-07-05 23:45 UTCEG score recompute
  4. 2026-07-05 12:52 UTCEG score recompute
  5. 2026-07-05 01:53 UTCEG score recompute
  6. 2026-07-04 14:59 UTCEG score recompute
  7. 2026-07-04 04:06 UTCEG score recompute
  8. 2026-07-03 17:10 UTCEG score recompute
  9. 2026-07-03 06:18 UTCEG score recompute
  10. 2026-07-02 19:16 UTCEG score recompute
  11. 2026-07-02 08:24 UTCEG score recompute
  12. 2026-07-01 21:31 UTCEG score recompute
  13. 2026-07-01 10:37 UTCEG score recompute
  14. 2026-06-30 23:44 UTCEG score recompute
  15. 2026-06-30 12:49 UTCEG score recompute
  16. 2026-06-30 01:54 UTCEG score recompute
  17. 2026-06-29 15:02 UTCEG score recompute
  18. 2026-06-29 04:09 UTCEG score recompute
  19. 2026-06-28 17:15 UTCEG score recompute
  20. 2026-06-28 06:22 UTCEG score recompute
  21. 2026-06-27 19:27 UTCEG score recompute
  22. 2026-06-27 08:33 UTCEG score recompute
  23. 2026-06-26 21:40 UTCEG score recompute

Frequently asked(4)

What is CVE-2026-48804?
CVE-2026-48804 is a high vulnerability published on June 26, 2026. python-socketio: Binary attachment accumulation can cause denial of service 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…
When was CVE-2026-48804 disclosed?
CVE-2026-48804 was first published in the National Vulnerability Database on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-48804?
CVE-2026-48804 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-48804?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48804, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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