CVE-2026-54049

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

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

Score 8.7 from GitHub Security Advisory (severity: HIGH) published 2026-08-24. A secondary CVSS source baseline 8.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.7Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Sakai is a Collaboration and Learning Environment (CLE). From versions 23.0 to before 23.5, and versions 25.0 to before 25.3, the Sakai Conversations tool stores topic and post messages without HTML sanitization, and the frontend renders them using LitElement's unsafeHTML() directive, resulting in stored cross-site scripting (XSS). Any authenticated user with access to a site that has the Conversations tool enabled can inject arbitrary HTML and JavaScript that executes in the browsers of all other users who view that topic or post. This issue has been patched in versions 23.5, 25.3, and 26.0.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
55
EG Risk 55/100

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)
Severity87% × 45%
The EG Score, 8.7 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (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: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
15th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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 24, 2026

Last Modified

October 6, 2026

Advisory Details (2)

Auto-updated Oct 1, 2026
Fix named in the CVE record. Sources: github, github_commit.
GitHub commit

commit 2696b4b48cbe (sakaiproject/sakai)

Fix landed in sakaiproject/sakai commit 2696b4b48cbe — awaiting tagged release

https://github.com/sakaiproject/sakai/commit/2696b4b48cbef2e81512f52f84f7477adff78b27
GitHub advisoryMentions a patch (unverified)

SAK-52622 XSS in Sakai Conversations · Advisory · sakaiproject/sakai · GitHub

https://github.com/sakaiproject/sakai/security/advisories/GHSA-w2x5-gv52-9ccv

Vendor Advisories for CVE-2026-54049(1)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
mavenorg.sakaiproject.conversations:sakai-conversations-impl—ghsa
mavenorg.sakaiproject.kernel:sakai-kernel-impl—ghsa
mavenorg.sakaiproject.rubrics:rubrics-impl—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 1 ecosystem)
Maven(3)
PackageVulnerable rangeFix by version rangeDependents
org.sakaiproject.conversations:sakai-conversations-impl23.0, 23.1, 23.2, 23.3
  • 23.0 through 23.3: no fix on record
—
org.sakaiproject.kernel:sakai-kernel-impl23.0, 23.1, 23.2, 23.3
  • 23.0 through 23.3: no fix on record
—
org.sakaiproject.rubrics:rubrics-impl23.0, 23.1, 23.2, 23.3
  • 23.0 through 23.3: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 73× 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 112 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 12 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  3. 2026-10-12 15:57 UTCEG score recompute
  4. 2026-10-11 19:40 UTCEG score recompute
  5. 2026-10-11 16:55 UTCEG score recompute
  6. 2026-10-11 14:18 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  9. 2026-10-10 12:31 UTCEG score recompute
  10. 2026-10-10 12:31 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  12. 2026-10-09 04:41 UTCEG score recompute
  13. 2026-10-09 04:41 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  14. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  15. 2026-10-08 03:50 UTCEG score recompute
  16. 2026-10-08 03:50 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  18. 2026-10-07 05:33 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  19. 2026-10-06 16:40 UTCEG score recompute
  20. 2026-10-06 16:39 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  21. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  22. 2026-10-06 03:18 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  23. 2026-10-06 03:18 UTCEG score recompute
  24. 2026-10-06 03:18 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  25. 2026-10-06 02:35 UTCEG score recompute
Show 75 more
  1. 2026-10-06 02:35 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  2. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  3. 2026-10-05 09:34 UTCEG score recompute
  4. 2026-10-05 09:34 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  5. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  6. 2026-10-04 20:41 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  7. 2026-10-04 05:23 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  8. 2026-10-03 16:30 UTCEG score recompute
  9. 2026-10-03 16:30 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  10. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  11. 2026-10-02 18:51 UTCEG score recompute
  12. 2026-10-02 18:51 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 15th percentile
  14. 2026-10-02 09:22 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  15. 2026-10-01 20:29 UTCEG score recompute
  16. 2026-10-01 20:29 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  17. 2026-10-01 19:51 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  18. 2026-10-01 09:10 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  19. 2026-09-30 20:17 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  20. 2026-09-30 06:59 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  21. 2026-09-29 15:32 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  22. 2026-09-29 02:40 UTCEG score recompute
  23. 2026-09-29 02:40 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  24. 2026-09-28 13:46 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  25. 2026-09-28 00:52 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  26. 2026-09-27 11:59 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  27. 2026-09-26 22:18 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  28. 2026-09-25 05:01 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  29. 2026-09-24 16:08 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  30. 2026-09-24 03:15 UTCEG score recompute
  31. 2026-09-24 03:15 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  32. 2026-09-23 14:22 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  33. 2026-09-23 01:27 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  34. 2026-09-22 12:33 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  35. 2026-09-21 23:41 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  36. 2026-09-21 10:47 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  37. 2026-09-20 21:54 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  38. 2026-09-20 09:00 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  39. 2026-09-19 20:07 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  40. 2026-09-19 07:13 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  41. 2026-09-18 18:19 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  42. 2026-09-18 05:09 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  43. 2026-09-17 16:16 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  44. 2026-09-17 03:22 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  45. 2026-09-16 14:28 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  46. 2026-09-16 01:35 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  47. 2026-09-15 12:42 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  48. 2026-09-14 23:44 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  49. 2026-09-14 10:45 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  50. 2026-09-13 21:52 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  51. 2026-09-13 08:59 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  52. 2026-09-12 20:06 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  53. 2026-09-12 07:13 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  54. 2026-09-11 18:20 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  55. 2026-09-11 05:27 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  56. 2026-09-10 16:30 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  57. 2026-09-10 03:09 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  58. 2026-09-09 14:16 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  59. 2026-09-09 01:21 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  60. 2026-09-07 21:02 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  61. 2026-09-07 08:08 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  62. 2026-09-06 19:15 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  63. 2026-09-06 06:21 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  64. 2026-09-05 17:28 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  65. 2026-09-05 04:35 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  66. 2026-09-04 15:42 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  67. 2026-09-04 02:47 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  68. 2026-09-03 13:50 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  69. 2026-09-03 00:55 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  70. 2026-09-02 11:55 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  71. 2026-09-01 22:58 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  72. 2026-09-01 10:05 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  73. 2026-08-31 21:10 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  74. 2026-08-31 08:16 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7
  75. 2026-08-30 19:20 UTCGHSA enrichmentGHSA-w2x5-gv52-9ccv · GitHub severity HIGH · GitHub CVSS 8.7

Related CVEs(same product + same CWE)

Same product

2 shown

Maven:org.sakaiproject.kernel:sakai-kernel-impl

Frequently asked(5)

What is CVE-2026-54049?
CVE-2026-54049 is a high-severity vulnerability; its CVE record was published on August 24, 2026. Sakai is a Collaboration and Learning Environment (CLE). From versions 23.0 to before 23.5, and versions 25.0 to before 25.3, the Sakai Conversations tool stores topic and post messages without HTML sanitization, and the frontend renders them using LitElement's unsafeHTML() directive, resulting in…
When was the CVE record for CVE-2026-54049 published?
The CVE record for CVE-2026-54049 was published on August 24, 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 October 6, 2026; the record at its source may have been updated since.
Is CVE-2026-54049 actively exploited?
CVE-2026-54049 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54049?
CVE-2026-54049 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54049?
The CVE record for CVE-2026-54049 names the fix: "This issue has been patched in versions 23.5, 25.3, and 26.0." The vendor advisories EchelonGraph has for CVE-2026-54049 are linked in the Vendor Advisories panel on this page.

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