---
title: "CVE-2026-77614: Opencast - Authentication Bypass"
description: "Opencast < 19.7 and < 20.2 contain a session fixation vulnerability caused by accepting client-selected JSESSIONID from URL path parameter without replacement on login, letting unauthenticated attackers hijack authenticated sessions, exploit requires victim to authenticate via crafted link."
url: https://panop.io/threat-heartbeat/CVE-2026-77614/
---

# CVE-2026-77614 Opencast - Authentication Bypass

Opencast < 19.7 and < 20.2 contain a session fixation vulnerability caused by accepting client-selected JSESSIONID from URL path parameter without replacement on login, letting unauthenticated attackers hijack authenticated sessions, exploit requires victim to authenticate via crafted link.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.55% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-77614)

## Details

Type

Authentication Bypass

Impact

Privilege Escalation, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

17 September 2026

Updated

15 October 2026

Weakness

[CWE-384](https://cwe.mitre.org/data/definitions/384.html)

## Vendor fix

Update to versions 19.7 or 20.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-77614](https://nvd.nist.gov/vuln/detail/CVE-2026-77614)
- [https://github.com/opencast/opencast/commit/c36652250a026afb7cf78b663950c702669f1d3f](https://github.com/opencast/opencast/commit/c36652250a026afb7cf78b663950c702669f1d3f)
- [https://github.com/opencast/opencast/commit/ff84128c9b3bcbd79c28192d25929dab8faf185f](https://github.com/opencast/opencast/commit/ff84128c9b3bcbd79c28192d25929dab8faf185f)
- [https://github.com/opencast/opencast/releases/tag/19.7](https://github.com/opencast/opencast/releases/tag/19.7)
- [https://github.com/opencast/opencast/releases/tag/20.2](https://github.com/opencast/opencast/releases/tag/20.2)
- [https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p](https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7p)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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