Vulnerability · Published Oct 20, 2026 · Assigned by GitHub_M
CVE-2026-113667ApostropheCMS: CAPTCHA response token not URL-encoded
Medium 5.3
In plain English
A medium-severity security flaw in apostrophe from apostrophecms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the Form add-on, 1.2.1 of login-recaptcha, and 1.3.0 of login-hcaptcha, these three CAPTCHA integrations interpolate an unencoded user-supplied response token into the provider verification request. Crafted tokens can smuggle request parameters and disrupt CAPTCHA verification and CAPTCHA-gated form or login flows; automated bypass probing is possible, but a successful CAPTCHA bypass or secret disclosure is not established. This issue is fixed in Form 1.5.5, login-recaptcha 1.2.1, and login-hcaptcha 1.3.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @apostrophecms/form | 1.5.5 | GHSA-44qr-rrjg-2cqq |
| npm | @apostrophecms/login-hcaptcha | 1.3.0 | GHSA-44qr-rrjg-2cqq |
| npm | @apostrophecms/login-recaptcha | 1.2.1 | GHSA-44qr-rrjg-2cqq |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| apostrophecms | apostrophe | < 4.33.0 |
| @apostrophecms | form | < 1.5.5 |
| @apostrophecms | login-hcaptcha | < 1.3.0 |
| @apostrophecms | login-recaptcha | < 1.2.1 |
Weakness: CWE-116 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
References
- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-44qr-rrjg-2cqq x_refsource_CONFIRM
- https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce x_refsource_MISC
- https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350 x_refsource_MISC
- https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5 x_refsource_MISC