CVE-2026-12606

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

Score 5.3 from GitHub Security Advisory published 2026-07-14. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: 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 (Eclipse Foundation) lists Eclipse Foundation Eclipse GlassFish versions 4.0.0 up to and including 4.0.2 and 5.0.0 up to but not including 5.0.2 as affected. No release containing a fix is confirmed on record.

Eclipse Grizzly in versions before 5.0.2, cannot properly parse the trailer section in malformed trailer header's line, which can be leveraged to perform HTTP request smuggling. Grizzly 5.0.1 supports system properties that enable the behavior that fixes the vulnerability - set org.glassfish.grizzly.http.STRICT_HEADER_NAME_VALIDATION_RFC_9110 and org.glassfish.grizzly.http.STRICT_HEADER_VALUE_VALIDATION_RFC_9110 system properties to "true".

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 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 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

July 14, 2026

Last Modified

July 27, 2026

Advisory Details (1)

Auto-updated Jul 14, 2026
No fix on record yet.
Web page

CVE reservation request for GlassFish project, Grizzly component, report #293: HTTP Request Smuggling (#129) · Issues · Eclipse Projects Security / cve-assignment · GitLab

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/129

Vendor Advisories for CVE-2026-12606(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 35× 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 174 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 74 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-12 16:36 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-11 20:12 UTCEG score recompute
  6. 2026-10-11 18:24 UTCEG score recompute
  7. 2026-10-11 14:57 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-01 13:28 UTCEG score recompute
  19. 2026-10-01 13:28 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-28 09:24 UTCEG score recompute
  24. 2026-09-28 09:24 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  25. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 20th percentile
Show 75 more
  1. 2026-09-24 09:56 UTCEG score recompute
  2. 2026-09-24 09:56 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  3. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  4. 2026-09-23 04:00 UTCEG score recompute
  5. 2026-09-23 04:00 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  6. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  7. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-09-18 04:57 UTCEG score recompute
  9. 2026-09-18 04:57 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  10. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-09-14 08:05 UTCEG score recompute
  12. 2026-09-14 08:05 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  13. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  14. 2026-09-13 07:56 UTCEG score recompute
  15. 2026-09-13 07:56 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  16. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  17. 2026-09-12 01:47 UTCEG score recompute
  18. 2026-09-12 01:47 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  19. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  22. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-09-08 01:49 UTCEG score recompute
  24. 2026-09-08 01:49 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  25. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  26. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  27. 2026-09-05 21:20 UTCEG score recompute
  28. 2026-09-05 21:20 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  29. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  30. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  31. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  32. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  33. 2026-08-31 05:48 UTCEG score recompute
  34. 2026-08-31 05:48 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  35. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  36. 2026-08-30 05:25 UTCEG score recompute
  37. 2026-08-30 05:25 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  38. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  40. 2026-08-28 02:29 UTCEG score recompute
  41. 2026-08-28 02:29 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  42. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  43. 2026-08-27 02:04 UTCEG score recompute
  44. 2026-08-27 02:04 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  45. 2026-08-26 01:55 UTCEG score recompute
  46. 2026-08-26 01:55 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  47. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  48. 2026-08-25 01:21 UTCEG score recompute
  49. 2026-08-25 01:21 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  50. 2026-08-24 01:12 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  51. 2026-08-23 01:04 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  52. 2026-08-22 00:55 UTCEG score recompute
  53. 2026-08-22 00:55 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  54. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  55. 2026-08-21 00:46 UTCEG score recompute
  56. 2026-08-21 00:46 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  57. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  58. 2026-08-20 00:37 UTCEG score recompute
  59. 2026-08-20 00:37 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  60. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  61. 2026-08-18 22:19 UTCEG score recompute
  62. 2026-08-18 22:19 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  63. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  64. 2026-08-17 21:53 UTCEG score recompute
  65. 2026-08-17 21:53 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  66. 2026-08-16 17:23 UTCEG score recompute
  67. 2026-08-16 17:23 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  68. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  69. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  70. 2026-08-15 17:14 UTCEG score recompute
  71. 2026-08-15 17:14 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  72. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  73. 2026-08-14 17:05 UTCEG score recompute
  74. 2026-08-14 17:05 UTCGHSA enrichmentGHSA-c269-4hpf-qfhc · GitHub CVSS 5.3
  75. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile

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Frequently asked(5)

What is CVE-2026-12606?
CVE-2026-12606 is a medium-severity vulnerability; its CVE record was published on July 14, 2026. Eclipse Grizzly in versions before 5.0.2, cannot properly parse the trailer section in malformed trailer header's line, which can be leveraged to perform HTTP request smuggling. Grizzly 5.0.1 supports system properties that enable the behavior that fixes the vulnerability - set…
When was the CVE record for CVE-2026-12606 published?
The CVE record for CVE-2026-12606 was published on July 14, 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 July 27, 2026; the record at its source may have been updated since.
Is CVE-2026-12606 actively exploited?
CVE-2026-12606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12606?
CVE-2026-12606 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-12606?
No fix for CVE-2026-12606 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 (Eclipse Foundation) lists Eclipse Foundation Eclipse GlassFish versions 4.0.0 up to and including 4.0.2 and 5.0.0 up to but not including 5.0.2 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-12606 are linked in the Vendor Advisories panel on this page.

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