CVE-2026-63757Network attack vector

Unauthenticated session hijacking via RPC session enumeration

Published Jul 20, 2026 · Updated Jul 20, 2026

Session hijacking in SurrealDB before 3.1.0 allows remote attackers to impersonate attached authenticated HTTP sessions. The HTTP /rpc sessions method exposes every attached session UUID without authentication, while the handler accepts a client-supplied session field without verifying ownership. Exploitation requires an authenticated session created through HTTP attach; hijacking grants that session's data access and privilege level, including read, write, deletion, and root-level access.

CVSS severity8.7
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session hijacking in SurrealDB before 3.1.0 allows remote attackers to impersonate attached authenticated HTTP sessions. The HTTP /rpc sessions method exposes every attached session UUID without authentication, while the handler accepts a client-supplied session field without verifying ownership. Exploitation requires an authenticated session created through HTTP attach; hijacking grants that session's data access and privilege level, including read, write, deletion, and root-level access.

The record

CVE
CVE-2026-63757
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
SurrealDB
Product
SurrealDB
Classifications
CWE-384, CWE-306, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SurrealDB · SurrealDBversion=0 <3.1.0

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
CWE-306Missing Authentication for Critical Function
T1550.004Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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