CVE-2026-19912

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-25. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 9.8Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

The CVE record's CNA (CERT/CC) lists Kaltura HTML5 Video Player, html5 library versions up to and including v2.103 as affected. No release containing a fix is confirmed on record.

The Kaltura HTML5 player (mwEmbed / html5lib) contains an unauthenticated remote code execution vulnerability caused by unsafe data deserialization and unsanitized filesystem path construction. mwEmbedLoader.php accepts a user‑controlled ServiceUrl, whose response is passed to unserialize(), and the resulting object’s fields are written to a cache path derived from attacker‑supplied uiconf_id without proper path validation. An attacker can write arbitrary files into web‑accessible locations and achieve code execution as the webserver user. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases exposing the vulnerable endpoint.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

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 computed (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation1.0% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
1.0%
EPSS %ILE
61st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 25, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Oct 9, 2026
No fix on record yet. Sources: cert.
CERT

VU#308749 - Remote Code Execution and Arbitrary File Read Vulnerabilities in Kaltura Servers

https://kb.cert.org/vuls/id/308749

Vendor Advisories for CVE-2026-19912(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 24× in last 7d / 170× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 277 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 177 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 13:06 UTCEG score recompute
  2. 2026-10-14 13:05 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  4. 2026-10-13 11:14 UTCEG score recompute
  5. 2026-10-13 11:14 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  7. 2026-10-12 16:24 UTCEG score recompute
  8. 2026-10-12 09:25 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-11 20:06 UTCEG score recompute
  10. 2026-10-11 17:19 UTCEG score recompute
  11. 2026-10-11 14:51 UTCEG score recompute
  12. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  13. 2026-10-10 19:59 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  14. 2026-10-10 16:22 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-10 12:01 UTCEG score recompute
  16. 2026-10-10 12:00 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-09 20:06 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  18. 2026-10-09 04:22 UTCEG score recompute
  19. 2026-10-09 04:21 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  21. 2026-10-08 07:29 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-08 03:15 UTCEG score recompute
  23. 2026-10-08 03:15 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  25. 2026-10-07 09:58 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
Show 75 more
  1. 2026-10-07 05:43 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-10-07 01:28 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-06 21:14 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-06 16:39 UTCEG score recompute
  5. 2026-10-06 16:39 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  7. 2026-10-06 11:58 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-10-06 07:42 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-06 02:31 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-05 18:06 UTCEG score recompute
  11. 2026-10-05 18:06 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  13. 2026-10-05 13:48 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-05 09:17 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-05 04:42 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-05 00:05 UTCEG score recompute
  17. 2026-10-05 00:05 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  19. 2026-10-04 19:50 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-04 15:35 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-04 11:08 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-04 06:28 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-04 02:13 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-03 20:46 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-03 16:26 UTCEG score recompute
  26. 2026-10-03 16:26 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-03 05:01 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  28. 2026-10-03 00:36 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  29. 2026-10-02 19:51 UTCEG score recompute
  30. 2026-10-02 19:51 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-02 15:37 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-10-02 11:02 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  33. 2026-10-02 06:28 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-10-02 01:18 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  35. 2026-10-01 20:03 UTCEG score recompute
  36. 2026-10-01 20:03 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  38. 2026-10-01 14:05 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-01 09:51 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  40. 2026-10-01 05:36 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  41. 2026-10-01 01:07 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  42. 2026-09-30 20:14 UTCEG score recompute
  43. 2026-09-30 20:14 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  45. 2026-09-30 11:41 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-09-30 06:45 UTCEG score recompute
  47. 2026-09-30 06:45 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  49. 2026-09-29 12:47 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-09-29 05:58 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-09-29 01:43 UTCEG score recompute
  52. 2026-09-29 01:43 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-09-28 21:29 UTCEG score recompute
  54. 2026-09-28 21:29 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  55. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  56. 2026-09-28 12:53 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  57. 2026-09-28 08:38 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-09-28 04:24 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  59. 2026-09-28 00:09 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-09-27 19:54 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  61. 2026-09-27 15:40 UTCEG score recompute
  62. 2026-09-27 15:40 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  63. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  64. 2026-09-27 11:03 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-09-27 06:49 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  66. 2026-09-27 02:18 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  67. 2026-09-26 22:03 UTCEG score recompute
  68. 2026-09-26 22:02 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  69. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  70. 2026-09-25 17:22 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-09-25 13:06 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-09-25 08:51 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  73. 2026-09-25 04:36 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-09-25 00:22 UTCGHSA enrichmentGHSA-537c-gp6x-jr7q · GitHub severity CRITICAL · GitHub CVSS 9.8
  75. 2026-09-24 18:54 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19912?
CVE-2026-19912 is a critical-severity vulnerability; its CVE record was published on August 25, 2026. The Kaltura HTML5 player (mwEmbed / html5lib) contains an unauthenticated remote code execution vulnerability caused by unsafe data deserialization and unsanitized filesystem path construction. mwEmbedLoader.php accepts a user‑controlled ServiceUrl, whose response is passed to unserialize(), and…
When was the CVE record for CVE-2026-19912 published?
The CVE record for CVE-2026-19912 was published on August 25, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 3, 2026; the record at its source may have been updated since.
Is CVE-2026-19912 actively exploited?
CVE-2026-19912 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (61st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19912?
CVE-2026-19912 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-19912?
No fix for CVE-2026-19912 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (CERT/CC) lists Kaltura HTML5 Video Player, html5 library versions up to and including v2.103 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-19912 are linked in the Vendor Advisories panel on this page.

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