CVE-2026-33151

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.51% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 41.8% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-20 20:13Z5 MO AGO

Last updated

2026-03-23 16:50Z5 MO AGO

Reserved

2026-03-17

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-754Improper Check for Unusual or Exceptional ConditionsClass
• CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.2

Document digest

de300f9ebd4391bfcf12a52b2c44a5dc4faf26eaf4444fb73675f6dc545b02cd

• github.comhttps://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9x_refsource_CONFIRM
• github.comhttps://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4x_refsource_MISC
• github.comhttps://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faafx_refsource_MISC
• github.comhttps://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78x_refsource_MISC