# CVE-2026-112783: OpenCATS authorization bypass in activity management

Source: https://junglewise.ai/threats/cve-2026-112783-opencats-before-0-10-0-contains-a-missing-authorization  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-112783 · Severity: medium · CVSS 4.3 · Published 2026-10-20

OpenCATS is a recruiting and applicant tracking system used by HR teams to manage job candidates, contacts, and company information. A missing authorization check in the activity entry system allows low-privilege users to arbitrarily edit or delete activity records for any candidate, contact, or company, potentially destroying audit trails and business intelligence records.

Technologies: [OpenCATS](https://junglewise.ai/threats/technologies/opencats). Vendors: [OpenCATS](https://junglewise.ai/threats/vendors/opencats).

## Quick answers

**Is CVE-2026-112783 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-112783 being exploited in the wild.

**How severe is CVE-2026-112783?** Medium severity, with a CVSS score of 4.3, published 20 October 2026.

**Which products and versions are affected?** OpenCATS before 0.10.0.

**Is there a fix for CVE-2026-112783?** Yes: fixed in 0.10.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-112783 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-112783?** Check whether you run OpenCATS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 0.10.0

## Technical details

The ajax/deleteActivity.php and ajax/editActivity.php endpoints perform insufficient authorization checks, validating only that an activityID parameter is supplied, but not that the authenticated user has permission to modify that specific activity. An authenticated attacker can supply an arbitrary activityID via GET or POST to modify or delete activity and pipeline history entries.

## Affected products

- OpenCATS OpenCATS before 0.10.0

## Timeline

- 2026-10-20: disclosed

## References

- [https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/deleteActivity.php](https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/deleteActivity.php)
- [https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/editActivity.php](https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/editActivity.php)

## Related threats

- [OpenCATS authenticated SQL injection in date filtering](https://junglewise.ai/threats/cve-2026-54455-opencats-is-an-open-source-applicant-tracking-system-and)
- [OpenCATS code injection in Professional License configuration](https://junglewise.ai/threats/cve-2026-54453-opencats-is-an-open-source-applicant-tracking-system-and)
- [OpenCATS stored cross-site scripting in MRU navigation panel](https://junglewise.ai/threats/cve-2026-115513-opencats-before-0-12-0-contains-a-stored-cross-site-scripting)
- [OpenCATS authorization bypass in calendar event management](https://junglewise.ai/threats/cve-2026-113349-opencats-before-0-10-0-contains-a-missing-authorization)
- [OpenCATS missing authorization in reports module](https://junglewise.ai/threats/cve-2026-112787-opencats-before-0-10-0-contains-a-missing-authorization)