CVE-2026-63743Network attack vector

Authenticated SSRF via port-stripped redirect target

Published Jul 20, 2026 · Updated Jul 20, 2026

SSRF in SurrealDB before 3.1.0 allows remote authenticated users to reach port-denied network services through HTTP redirects. The outbound redirect policy in surrealdb/core/src/fnc/util/http/mod.rs builds NetTarget from url.host_str() but drops url.port(), preventing the capability matcher from applying a port-bearing deny rule to the redirected destination. Exploitation requires permission to call http::* functions, an allowed redirect host, and a port-scoped deny configuration; host-only deny rules are unaffected, and consequences depend on the blocked service reached.

CVSS severity5.3
Medium
EPSS probability0.25%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in SurrealDB before 3.1.0 allows remote authenticated users to reach port-denied network services through HTTP redirects. The outbound redirect policy in surrealdb/core/src/fnc/util/http/mod.rs builds NetTarget from url.host_str() but drops url.port(), preventing the capability matcher from applying a port-bearing deny rule to the redirected destination. Exploitation requires permission to call http::* functions, an allowed redirect host, and a port-scoped deny configuration; host-only deny rules are unaffected, and consequences depend on the blocked service reached.

The record

CVE
CVE-2026-63743
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
SurrealDB
Product
SurrealDB
Classifications
CWE-918
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

SurrealDB · SurrealDBversion=0 <3.1.0

Published CVSS scores

5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.4GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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