CVE-2026-57449Public exploitNetwork attack vector

Private repository disclosure via prefix-matched allowlist

Published Sep 25, 2026 · Updated Sep 25, 2026

Incorrect authorization in Actual Sync Server before 26.7.0 allows remote authenticated users to read private GitHub repository data. The CORS proxy uses startsWith on GitHub API repository paths without a boundary and then attaches the server token to prefix-matched requests. Exploitation requires the disabled-by-default proxy, a configured token with private-repository access, and an allowlisted repository whose name prefixes the target.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Actual Sync Server before 26.7.0 allows remote authenticated users to read private GitHub repository data. The CORS proxy uses startsWith on GitHub API repository paths without a boundary and then attaches the server token to prefix-matched requests. Exploitation requires the disabled-by-default proxy, a configured token with private-repository access, and an allowlisted repository whose name prefixes the target.

The record

CVE
CVE-2026-57449
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
Actual Budget
Product
Actual
Classifications
CWE-863, CWE-200, CWE-284, T1213.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=< 26.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Actual Budget · Actualversion=< 26.7.0

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-284Improper Access Control
T1213.003Data from Information Repositories: Code Repositories

Public exploit references

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

Technologies

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Your stack

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