Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool. From 5.0.0 through 5.10.13, submitted values from public Freeform forms can be evaluated by the isolated Twig renderer when rendered into HTML attributes. An unauthenticated attacker can place Twig expressions in submitted field values, including value attributes, and receive evaluated PHP, operating-system, or Craft filesystem-path constants in the form response. The isolated context was not shown to expose Craft globals, environment variables, credentials, arbitrary files, or code execution, so the confirmed impact is limited server and environment information disclosure and possible rendering errors. This issue is fixed in version 5.10.14.
CVE-2026-73858
MEDIUMPre-NVD 5.35.3Elevated
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 5.3 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 5.3Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(low)
- EG Risk
- 55(Attend)EG Risk 55/100SSVC: Attend
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 computedSeverity53% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
September 23, 2026
Last Modified
September 23, 2026
Advisory Details (4)
Auto-updated Sep 23, 2026🔬 Proof of concept available. Patch available. Sources: github_release, github, github_pr, github_commit.
github_release Patch Available
v5.10.14
Patch available: solspace/craft-freeform v5.10.14
https://github.com/solspace/craft-freeform/releases/tag/v5.10.14github_commit Patch Available
commit 5f7555320635 (solspace/craft-freeform)
Patch available: solspace/craft-freeform v5.15.6.1 (contains commit 5f7555320635)
https://github.com/solspace/craft-freeform/commit/5f7555320635f1cd3b4c478aa0b58e8c3144313bgithub_pr Patch Available
[SFT-2065]: Server Side Template Injection vulnerability
Patch available: solspace/craft-freeform v5.15.6.1 (PR #1986 merged 2025-05-13)
https://github.com/solspace/craft-freeform/pull/1986github Patch Available🟡 PoC Available
Limited Twig template injection via submitted field values in Freeform 5.0.0–5.10.13 · Advisory · solspace/craft-freeform · GitHub
https://github.com/solspace/craft-freeform/security/advisories/GHSA-gxrg-x694-283wVendor Advisories for CVE-2026-73858(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 5× in last 7d / 5× 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.
- 2026-09-23 16:17 UTCEG score recompute
- 2026-09-23 15:29 UTCEG score recompute
- 2026-09-23 15:17 UTCEG score recompute
- 2026-09-23 14:40 UTCEG score recompute
- 2026-09-23 14:39 UTCMITRE cvelistV5first tracked
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Same CWE
10 shownCWE-1336
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- CVE-2025-12107NVD 7.2EG 10.0CRITICAL
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Frequently asked(4)
What is CVE-2026-73858?
CVE-2026-73858 is a medium vulnerability published on September 23, 2026. Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool. From 5.0.0 through 5.10.13, submitted values from public Freeform forms can be evaluated by the isolated Twig renderer when rendered into HTML attributes. An unauthenticated attacker can place Twig expressions in…
When was CVE-2026-73858 disclosed?
CVE-2026-73858 was first published in the National Vulnerability Database on September 23, 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-2026-73858?
CVE-2026-73858 has a CVSS v3 base score of 5.3 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-73858?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73858, 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-2026-73858
Is Your Infrastructure Affected by CVE-2026-73858?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.