Vulnerability in solspace/craft-freeform (CVE-2026-73858)
Summary
Vulnerability in solspace/craft-freeform (CVE-2026-73858). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 5.10.14 or later.
Original description
The description as published by the source.
Summary
A limited server-side Twig template injection issue was identified in Solspace Freeform for Craft CMS. In affected versions, submitted form field values could be evaluated as Twig in certain rendering contexts.
Unauthenticated users could submit Twig expressions through public Freeform forms and have those expressions evaluated when the submitted values were rendered back into the form response. Confirmed impact includes disclosure of limited server/environment information, such as the PHP version and absolute filesystem paths.
No evidence was found that this issue allowed access to Craft globals, environment variables, database credentials, mailer credentials, security keys, or remote code execution in the tested environment.
Details
Plugin: Solspace Freeform
Affected versions: Freeform 5.0.0 through 5.10.13
CMS: Craft CMS
Authentication required: None
Attack vector: Public Freeform form submission
Submitted field values were passed through Freeform’s isolated Twig renderer. As a result, Twig expressions included in submitted values could be evaluated server-side and reflected in the HTTP response.
The isolated Twig context appears to limit the available functions and globals. Confirmed accessible values were limited to PHP/core constants and Craft bootstrap constants such as:
{{ constant('PHP_VERSION') }}
{{ constant('PHP_OS') }}
{{ constant('CRAFT_BASE_PATH') }}
{{ constant('CRAFT_VENDOR_PATH') }}
Testing did not con…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-73858 has been found in solspace/craft-freeform.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: upgrade solspace/craft-freeform to 5.10.14 or later.
If unsure, ask your IT team or search "solspace/craft-freeform CVE-2026-73858" on the vendor's site.
CVE-2026-73858 (solspace/craft-freeform) — CWE-1336 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 5.10.14 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-1336) exists in solspace/craft-freeform.
Check the vendor advisory for the affected versions of solspace/craft-freeform.
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.
Update to 5.10.14.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'solspace/craft-freeform' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'solspace/craft-freeform' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
solspace/craft-freeformを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade solspace/craft-freeform to 5.10.14ステージング環境で 5.10.14 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com