CVE-2026-50179Public exploitNetwork attack vector

Transaction data disclosure via unneutralized CSV formulas

Published Jul 7, 2026 · Updated Jul 7, 2026

CSV formula injection in Actual before 26.6.0 allows remote attackers to expose transaction data through crafted exported fields. The exportToCSV and exportQueryToCSV paths pass Payee, Notes, Account, and Category strings to csv-stringify without neutralizing formula prefixes. Exploitation requires attacker-controlled budget data, a CSV export, and a recipient opening the file in a spreadsheet, where formulas can disclose adjacent cells or alter displayed values.

CVSS severity4.2
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSV formula injection in Actual before 26.6.0 allows remote attackers to expose transaction data through crafted exported fields. The exportToCSV and exportQueryToCSV paths pass Payee, Notes, Account, and Category strings to csv-stringify without neutralizing formula prefixes. Exploitation requires attacker-controlled budget data, a CSV export, and a recipient opening the file in a spreadsheet, where formulas can disclose adjacent cells or alter displayed values.

The record

CVE
CVE-2026-50179
Published
Jul 7, 2026
Updated
Jul 7, 2026
Vendor
Actual Budget
Product
Actual
Classifications
CWE-1236, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 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=< 26.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Actual Budget · Actualversion=< 26.6.0

Published CVSS scores

4.2GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1236Improper Neutralization of Formula Elements in a CSV File
T1204.002User Execution: Malicious File

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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