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.
CVE-2026-77614
HIGHPre-NVD 8.88.8—Trending — 3 sources updated this weekElevated
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EG Risk
- 56(Track*)EG Risk 56/100SSVC: Track*
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity88% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Watch closely — could escalate to Attend. - EPSS PROB
- 0%
- EPSS %ILE
- 35%
- KEV
- Not listed
Published
September 17, 2026
Last Modified
September 17, 2026
Advisory Details (5)
Auto-updated Sep 17, 2026Patch available. Sources: github, github_commit, github_release.
github_release Patch Available
Opencast 20.2
Patch available: opencast/opencast 20.2
https://github.com/opencast/opencast/releases/tag/20.2github_release Patch Available
Opencast 19.7
Patch available: opencast/opencast 19.7
https://github.com/opencast/opencast/releases/tag/19.7github_commit
commit ff84128c9b3b (opencast/opencast)
Fix landed in opencast/opencast commit ff84128c9b3b — awaiting tagged release
https://github.com/opencast/opencast/commit/ff84128c9b3bcbd79c28192d25929dab8faf185fgithub_commit
commit c36652250a02 (opencast/opencast)
Fix landed in opencast/opencast commit c36652250a02 — awaiting tagged release
https://github.com/opencast/opencast/commit/c36652250a026afb7cf78b663950c702669f1d3fgithub Patch Available
Session fixation in login enables account takeover via crafted link · Advisory · opencast/opencast · GitHub
https://github.com/opencast/opencast/security/advisories/GHSA-6f53-jp7x-gg7pWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-18 19:34 UTCEG score recompute
- 2026-09-18 19:28 UTCEPSS rescore
- 2026-09-17 17:58 UTCEG score recompute
- 2026-09-17 15:44 UTCEG score recompute
- 2026-09-17 15:23 UTCEG score recompute
- 2026-09-17 14:34 UTCEG score recompute
- 2026-09-17 14:34 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-77614?
CVE-2026-77614 is a high vulnerability published on September 17, 2026. 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/mhdefaultorg.xml accepts a client-selected JSESSIONID from the ;jsessionid= URL path parameter and does not…
When was CVE-2026-77614 disclosed?
CVE-2026-77614 was first published in the National Vulnerability Database on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77614 actively exploited?
CVE-2026-77614 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.4% of all scored CVEs.
What is the CVSS score of CVE-2026-77614?
CVE-2026-77614 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-77614?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77614, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-77614
Is Your Infrastructure Affected by CVE-2026-77614?
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