FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's TokenAuth middleware uses a predictable authentication token computed as MD5(user_id + created_at + APP_KEY). This token is static (never expires/rotates), and if an attacker obtains the APP_KEY — a well-documented and common exposure vector in Laravel applications — they can compute a valid token for any user, including the administrator, achieving full account takeover without any password. This vulnerability can be exploited on its own or in combination with CVE-2026-27636. Version 1.8.206 fixes both vulnerabilities.
CVE-2026-27637
CRITICALPre-NVD 9.89.8
EchelonGraph scoreLOW confidence
This critical-severity CVE scores 9.8 under a secondary CVSS source (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: secondary
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(low)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: 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 computedSeverity98% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 48%
- KEV
- Not listed
Published
February 25, 2026
Last Modified
June 17, 2026
Advisory Details (3)
Auto-updated Jul 27, 2026🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available
Missing .htaccess in Restricted File Extensions Allows Remote Code Execution on Apache · Advisory · freescout-help-desk/freescout · GitHub
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vcgithub Patch Available🟡 PoC Available
Predictable Authentication Token Enables Account Takeover · Advisory · freescout-help-desk/freescout · GitHub
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9github_commit Patch Available
commit 004a8231f6e4 (freescout-help-desk/freescout)
Patch available: freescout-help-desk/freescout 1.8.206 (contains commit 004a8231f6e4)
https://github.com/freescout-help-desk/freescout/commit/004a8231f6e413af1d4680930b0e2342fd4283f9Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 2× in last 7d / 2× 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.
- 2026-07-27 14:07 UTCEG score recompute
- 2026-07-27 13:57 UTCOSV refresh
Related CVEs(same CWE)
Same CWE
10 shownCWE-330
Frequently asked(5)
What is CVE-2026-27637?
CVE-2026-27637 is a critical 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 TokenAuth middleware uses a predictable authentication token computed as MD5(userid + createdat + APPKEY). This token is static (never expires/rotates), and if an attacker…
When was CVE-2026-27637 disclosed?
CVE-2026-27637 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-2026-27637 actively exploited?
CVE-2026-27637 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 51.9% of all scored CVEs.
What is the CVSS score of CVE-2026-27637?
CVE-2026-27637 has a CVSS v3 base score of 9.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-27637?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27637, 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-2026-27637
Is Your Infrastructure Affected by CVE-2026-27637?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.