A vulnerability was detected in vas3k TaxHacker up to 0.8.5. Affected is the function generateInvoicePDF of the file /apps/invoices/actions.ts of the component Invoice PDF Renderer. Performing a manipulation of the argument businessLogo results in server-side request forgery. The attack is possible to be carried out remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
CVE-2026-94039
HIGHPre-NVD 7.37.3—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 7.3 from GitHub Security Advisory published 2026-09-20. a secondary CVSS source baseline 7.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.3
- EG Score
- 7.3(high)
- EG Risk
- 37(Track)EG Risk 37/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity73% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
September 20, 2026
Last Modified
September 20, 2026
Advisory Details (2)
Auto-updated Sep 20, 2026No patch confirmed yet.
generic
GitHub - vas3k/TaxHacker: Self-hosted AI accounting app. LLM analyzer for receipts, invoices, transactions with custom prompts and categories · GitHub
https://github.com/vas3k/TaxHacker/generic
[Security] Unauthenticated SSRF & local file read via generateInvoicePDF Server Action · Issue #186 · vas3k/TaxHacker · GitHub
https://github.com/vas3k/TaxHacker/issues/186Vendor Advisories for CVE-2026-94039(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 6× in last 7d / 6× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-21 05:50 UTCEG score recompute
- 2026-09-21 05:50 UTCGHSA enrichment
- 2026-09-20 17:17 UTCEG score recompute
- 2026-09-20 17:17 UTCNVD updateCVSS v4 → 5.5
- 2026-09-20 16:51 UTCEG score recompute
- 2026-09-20 16:51 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-918
Frequently asked(4)
What is CVE-2026-94039?
CVE-2026-94039 is a high vulnerability published on September 20, 2026. A vulnerability was detected in vas3k TaxHacker up to 0.8.5. Affected is the function generateInvoicePDF of the file /apps/invoices/actions.ts of the component Invoice PDF Renderer. Performing a manipulation of the argument businessLogo results in server-side request forgery. The attack is possible…
When was CVE-2026-94039 disclosed?
CVE-2026-94039 was first published in the National Vulnerability Database on September 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-94039?
CVE-2026-94039 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-94039?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-94039, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-94039
Is Your Infrastructure Affected by CVE-2026-94039?
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