CVE-2026-77614Opencast: Session fixation in login enables account takeover via crafted link
Updated under an hour ago ()
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It affects opencast. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
Opencast is a free, open-source platform to support the management of educational audio and video content. Prior to versions 19.7 and 20.2, the default security configuration in etc/security/mh_default_org.xml accepts a client-selected JSESSIONID from the ;jsessionid= URL path parameter and does not replace it when the victim logs in. An unauthenticated attacker can send a crafted link to a victim whose browser has no active Opencast session cookie, wait for the victim to authenticate, and then reuse the known identifier as the victim's authenticated session. This can expose the victim's data and actions and can produce full administrative account takeover when the victim is an administrator. This issue is fixed in versions 19.7 and 20.2.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-384
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
opencast opencast opencast:opencast (from the name) | before 19.7; from 20.0, < 20.2 | CNA record |
References
- https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7px-refsource-confirm
- https://github.com/opencast/opencast/commit/c36652250a026afb7cf78b663950c702669f1d3fx-refsource-misc
- https://github.com/opencast/opencast/commit/ff84128c9b3bcbd79c28192d25929dab8faf185fx-refsource-misc
- https://github.com/opencast/opencast/releases/tag/19.7x-refsource-misc
- https://github.com/opencast/opencast/releases/tag/20.2x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.