FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in app/Misc/Helper.php does not include .htaccess or .user.ini files. On Apache servers with AllowOverride All (a common configuration), an authenticated user can upload a .htaccess file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.
CVE-2026-27636
HIGHPre-NVD 8.88.8Trending — 3 sources updated this weekWeaponized
EchelonGraph scoreLOW confidence
This high-severity CVE scores 8.8 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: cna:github_m
8.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
- Public exploit code is available (Metasploit, ssvc poc, public exploit)
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: Metasploit · ssvc poc · public exploitExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(low)
- EG Risk
- 66(Track*)EG Risk 66/100SSVC: 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 computedSeverity88% × 45%Exploitation65% × 40%Automatability0% × 15%Action: Watch closely — could escalate to Attend. - EPSS PROB
- 2%
- EPSS %ILE
- 80%
- KEV
- Not listed
Published
February 25, 2026
Last Modified
June 17, 2026
References (5)
- security-advisories@githubhttps://github.com/freescout-help-desk/freescout/commit/9984071e6f1b4e633fdcffcea82bbebc9c1e009c
- security-advisories@githubhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9
- security-advisories@githubhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× 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.
- 2026-07-28 15:36 UTCEPSS rescore
- 2026-07-27 12:55 UTCEG score recompute
- 2026-07-27 12:50 UTCOSV refresh
Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Metasploitexploit/multi/http/freescout_htaccess_rce✓ verifiedFirst seen Mar 1, 2026
FreeScout Unauthenticated RCE via ZWSP .htaccess Bypass
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-434
Frequently asked(5)
What is CVE-2026-27636?
CVE-2026-27636 is a high vulnerability published on February 25, 2026. FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in app/Misc/Helper.php does not include .htaccess or .user.ini files. On Apache servers with AllowOverride All (a common configuration), an…
When was CVE-2026-27636 disclosed?
CVE-2026-27636 was first published in the National Vulnerability Database on February 25, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27636 actively exploited?
CVE-2026-27636 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 20.0% of all scored CVEs.
What is the CVSS score of CVE-2026-27636?
CVE-2026-27636 has a CVSS v3 base score of 8.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-27636?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27636, 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-2026-27636
Is Your Infrastructure Affected by CVE-2026-27636?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.