CVE-2023-43799Public exploit

Data exposure via unsanitized external URL handling

Published Oct 4, 2023 · Updated Sep 20, 2024

Improper URL validation in Altair GraphQL Client before 5.2.5 allows local users to read user data via crafted external URLs. The non-isolated Electron renderer forwards window.open targets to the operating system without rejecting malformed or file-scheme URLs. Exploitation requires user interaction and code running in the renderer; a file URL can launch an installed application with the user’s privileges.

CVSS severity5.0
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper URL validation in Altair GraphQL Client before 5.2.5 allows local users to read user data via crafted external URLs. The non-isolated Electron renderer forwards window.open targets to the operating system without rejecting malformed or file-scheme URLs. Exploitation requires user interaction and code running in the renderer; a file URL can launch an installed application with the user’s privileges.

The record

CVE
CVE-2023-43799
Published
Oct 4, 2023
Updated
Sep 20, 2024
Vendor
Altair GraphQL
Product
Altair
Classifications
CWE-20, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 2024Record 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 <5.2.5
  2. Affected versionversion=< 5.2.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Altair GraphQL · Altairversion=0 <5.2.5; version=< 5.2.5

Published CVSS scores

5.0GitHub CNACVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1203Exploitation for Client Execution

Public exploit references

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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