CVE-2026-19204

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-72335 (ENISA EUVD) · GHSA-w753-5ffq-99wr (GitHub Security Advisories)Source: ENISA EUVD

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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A client may send a WebSocket frame with an unknown opcode and a very large declared payload length, causing Jetty to attempt a large memory allocation and potentially exhaust the JVM heap.

This occurs when auto-fragmentation is enabled, as unknown opcodes bypass the normal maximum frame size handling and payload allocation occurs before the opcode is validated.

CVSS
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
54
EG Risk 54/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity87% × 45%
Impact severity (EG Severity): CVSS 8.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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 partial (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: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.7): severity, escalated by confirmed exploitation. This CVE's 8.7 is its impact severity (EG Severity), not escalated.

EG Severity
8.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

September 7, 2026

Last Modified

September 8, 2026

Vendor Advisories for CVE-2026-19204(1)

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

Affected Packages

(5 across 3 ecosystems)
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
jetty1212.0.17-3 ... 12.0.40-2 (9 versions)
  • every version on: no fix on record
—
jetty99.4.57-1 ... 9.4.58-2 (6 versions)
  • every version on: no fix on record
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
jetty1212.0.17-3 ... 12.0.33-1 (6 versions)
  • every version up to 12.0.39-1: fixed in 12.0.39-1
—
jetty99.4.57-1 ... 9.4.58-2 (6 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
jetty99.4.50-4 ... 9.4.58-2 (18 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 34× 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 its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 174 rows 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 74 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  5. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  7. 2026-11-08 07:42 UTCEchelonGraph re-scored
  8. 2026-11-08 07:42 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  9. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  16. 2026-11-01 03:03 UTCEchelonGraph re-scored
  17. 2026-11-01 03:03 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  18. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  22. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-10-25 14:44 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-10-24 22:23 UTCEchelonGraph re-scored
  2. 2026-10-24 22:23 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  3. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  4. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  5. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  6. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  7. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  9. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-10-18 03:58 UTCEchelonGraph re-scored
  11. 2026-10-17 17:44 UTCEchelonGraph re-scored
  12. 2026-10-17 17:44 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  13. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  14. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  16. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  17. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  18. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-10-12 16:26 UTCEchelonGraph re-scored
  20. 2026-10-11 20:06 UTCEchelonGraph re-scored
  21. 2026-10-11 17:19 UTCEchelonGraph re-scored
  22. 2026-10-11 14:51 UTCEchelonGraph re-scored
  23. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  25. 2026-10-10 10:22 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  26. 2026-10-09 22:47 UTCEchelonGraph re-scored
  27. 2026-10-09 22:47 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  28. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  29. 2026-10-09 00:54 UTCEchelonGraph re-scored
  30. 2026-10-09 00:54 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  31. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  32. 2026-10-08 10:18 UTCEchelonGraph re-scored
  33. 2026-10-08 10:18 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  34. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  35. 2026-10-07 22:41 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  36. 2026-10-07 10:42 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  37. 2026-10-06 23:09 UTCEchelonGraph re-scored
  38. 2026-10-06 23:09 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  39. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  40. 2026-10-06 11:37 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  41. 2026-10-06 00:01 UTCEchelonGraph re-scored
  42. 2026-10-06 00:01 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  43. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  44. 2026-10-05 11:33 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  45. 2026-10-04 23:58 UTCEchelonGraph re-scored
  46. 2026-10-04 23:58 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  47. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  48. 2026-10-04 12:26 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  49. 2026-10-04 00:54 UTCEchelonGraph re-scored
  50. 2026-10-04 00:54 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  51. 2026-10-03 12:31 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  52. 2026-10-03 00:59 UTCEchelonGraph re-scored
  53. 2026-10-03 00:59 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  54. 2026-10-02 13:28 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  55. 2026-10-02 01:56 UTCEchelonGraph re-scored
  56. 2026-10-02 01:56 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  57. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  58. 2026-10-01 14:24 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  59. 2026-10-01 02:52 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  60. 2026-09-30 15:20 UTCEchelonGraph re-scored
  61. 2026-09-30 15:20 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  62. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  63. 2026-09-30 02:32 UTCEchelonGraph re-scored
  64. 2026-09-30 02:32 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  65. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  66. 2026-09-29 12:45 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  67. 2026-09-29 01:13 UTCEchelonGraph re-scored
  68. 2026-09-29 01:13 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  69. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  70. 2026-09-28 13:30 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  71. 2026-09-28 01:57 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  72. 2026-09-27 14:18 UTCEchelonGraph re-scored
  73. 2026-09-27 14:18 UTCGHSA enrichmentGHSA-w753-5ffq-99wr · GitHub severity HIGH
  74. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  75. 2026-09-27 02:47 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-19204?
CVE-2026-19204 is a high-severity vulnerability; its CVE record was published on September 7, 2026. A client may send a WebSocket frame with an unknown opcode and a very large declared payload length, causing Jetty to attempt a large memory allocation and potentially exhaust the JVM heap. This occurs when auto-fragmentation is enabled, as unknown opcodes bypass the normal maximum frame size…
When was the CVE record for CVE-2026-19204 published?
The CVE record for CVE-2026-19204 was published on September 7, 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 8, 2026; the record at its source may have been updated since.
Is CVE-2026-19204 actively exploited?
CVE-2026-19204 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19204?
CVE-2026-19204 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-2026-19204?
A fix for CVE-2026-19204 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-19204 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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