VulnerabilityAnalyzed
CVE-2026-3089
Actual Sync Server allows authenticated users to upload files through POST /sync/upload-user-file.
MEDIUM 5.3EPSS 0.38%
Does this matter?
Lower severity and a low EPSS score (0.38%). Track it; it rarely justifies an emergency change on its own.
Description
Actual Sync Server allows authenticated users to upload files through POST /sync/upload-user-file. In versions prior to 26.3.0, improper validation of the user-controlled x-actual-file-id header means that traversal segments (../) can escape the intended directory and write files outside userFiles.This issue affects prior versions of Actual Sync Server 26.3.0.
- CVSS 4.0
- 5.3 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.38% probability · 31th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- actualbudget/actual
- Source
- help@fluidattacks.com
References
- https://fluidattacks.com/advisories/fugueExploit, Third Party Advisory
- https://github.com/actualbudget/actualProduct
- https://github.com/actualbudget/actual/pull/7067Issue Tracking, Patch
- https://fluidattacks.com/advisories/fugueExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.