CVE-2026-27891

HIGHNVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. NVD baseline CVSS 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.2Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

FacturaScripts is an open source accounting and invoicing software. Versions 2026 and below contain a critical vulnerability in the Plugins::add() function. The system fails to properly validate the file paths within uploaded ZIP archives. This allows an attacker to perform a Zip Slip attack, leading to Arbitrary File Write and Remote Code Execution (RCE) by overwriting sensitive .php files outside the designated plugins directory. The vulnerability is located in Plugins.php. While the testZipFile function attempts to validate that the ZIP contains only one root folder, it does not sanitize or validate the individual file paths within that folder. An attacker can bypass this check by naming a file ValidPluginName/../../shell.php. The explode function will see ValidPluginName as the root folder, satisfying the count($folders) != 1 check. However, during extraction, the ../../ sequence triggers a path traversal, allowing the file to be written anywhere the web server has permissions the root directory. This issue is fixed in version 2026.1.

CVSS v3
7.2
EG Score
7.2(medium)
EG Risk
48(Track*)
EG Risk 48/100SSVC: 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 computed
Severity72% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

May 18, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Remote Code Execution (RCE) via Zip Slip in Plugin Upload Mechanism · Advisory · NeoRazorX/facturascripts · GitHub

https://github.com/NeoRazorX/facturascripts/security/advisories/GHSA-3pgc-xqg9-cfr6
github_commit Patch Available

commit 2dda7c6f3b24 (NeoRazorX/facturascripts)

Patch available: NeoRazorX/facturascripts v2026 (contains commit 2dda7c6f3b24)

https://github.com/NeoRazorX/facturascripts/commit/2dda7c6f3b241fa84a0629166783720b882725fd

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composerfacturascripts/facturascripts—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
facturascripts/facturascripts2018.03 ... v2025.8 (56 versions)——

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 55× 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.

Showing the most recent 100 of 163 total refreshes for this CVE.

  1. 2026-07-26 14:54 UTCEPSS rescore
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  3. 2026-07-26 08:21 UTCEG score recompute
  4. 2026-07-26 08:21 UTCGHSA enrichment
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  23. 2026-06-29 21:02 UTCGHSA enrichment
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  27. 2026-06-28 09:56 UTCGHSA enrichment
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  50. 2026-06-18 02:18 UTCGHSA enrichment
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  74. 2026-06-10 15:58 UTCGHSA enrichment
  75. 2026-06-10 13:22 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-27891?
CVE-2026-27891 is a high vulnerability published on May 18, 2026. FacturaScripts is an open source accounting and invoicing software. Versions 2026 and below contain a critical vulnerability in the Plugins::add() function. The system fails to properly validate the file paths within uploaded ZIP archives. This allows an attacker to perform a Zip Slip attack,…
When was CVE-2026-27891 disclosed?
CVE-2026-27891 was first published in the National Vulnerability Database on May 18, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27891 actively exploited?
CVE-2026-27891 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.8% of all scored CVEs.
What is the CVSS score of CVE-2026-27891?
CVE-2026-27891 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-27891?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27891, 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.

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