CVE-2026-78323

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory published 2026-08-24. A secondary CVSS source baseline 6.5; 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 week
6.5EG
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: 0.2%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

A flaw was found in JSS (Java Security Services). The JSSTrustManager class does not verify NSS trust flags when validating CA certificates, allowing certificates present in the NSS database without TRUSTED_CA flags to be accepted as trust anchors for TLS connections. In non-default configurations where certificate revocation checking is disabled, this could allow a man-in-the-middle attacker to forge certificates accepted by PKI client connections.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation0.2% × 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
0.2%
EPSS %ILE
6th
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

August 24, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 24, 2026
No fix on record yet. Sources: redhat.
Red Hat

2521775 – (CVE-2026-78323) CVE-2026-78323 jss: jss: JSSTrustManager does not verify NSS trust flags on CA certificates

https://bugzilla.redhat.com/show_bug.cgi?id=2521775
Red HatMentions a patch (unverified)

CVE-2026-78323 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-78323

Vendor Advisories for CVE-2026-78323(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
jss5.10.1-1 ... 5.9.0~beta3-4 (9 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
jss4.3.1-4 ... 5.9.0~beta3-4 (45 versions)
  • every version on: 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 / 72× 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 98 of 124 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 26 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-12 15:36 UTCEG score recompute
  4. 2026-10-11 19:22 UTCEG score recompute
  5. 2026-10-11 16:38 UTCEG score recompute
  6. 2026-10-11 13:57 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-10 13:13 UTCEG score recompute
  10. 2026-10-10 13:12 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-09 05:50 UTCEG score recompute
  13. 2026-10-09 05:50 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-08 04:52 UTCEG score recompute
  16. 2026-10-08 04:51 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-07 03:54 UTCEG score recompute
  19. 2026-10-07 03:54 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-10-06 02:56 UTCEG score recompute
  22. 2026-10-06 02:56 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-10-04 20:43 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
Show 73 more
  1. 2026-10-03 16:33 UTCEG score recompute
  2. 2026-10-03 16:33 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-10-02 09:12 UTCEG score recompute
  5. 2026-10-02 09:12 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  6. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-01 08:15 UTCEG score recompute
  8. 2026-10-01 08:15 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  9. 2026-09-30 07:17 UTCEG score recompute
  10. 2026-09-30 07:17 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  11. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-09-29 02:56 UTCEG score recompute
  13. 2026-09-29 02:56 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  14. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-09-28 01:58 UTCEG score recompute
  16. 2026-09-28 01:58 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  17. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-09-27 00:44 UTCEG score recompute
  19. 2026-09-27 00:44 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  20. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-09-25 03:57 UTCEG score recompute
  23. 2026-09-25 03:57 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  24. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-09-24 02:59 UTCEG score recompute
  26. 2026-09-24 02:59 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  27. 2026-09-23 02:02 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  28. 2026-09-22 01:05 UTCEG score recompute
  29. 2026-09-22 01:05 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  30. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-09-21 00:07 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  32. 2026-09-19 23:09 UTCEG score recompute
  33. 2026-09-19 23:09 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  34. 2026-09-18 22:11 UTCEG score recompute
  35. 2026-09-18 22:11 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  36. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  37. 2026-09-17 21:13 UTCEG score recompute
  38. 2026-09-17 21:13 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  39. 2026-09-16 15:48 UTCEG score recompute
  40. 2026-09-16 15:48 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  41. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  42. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  43. 2026-09-15 14:51 UTCEG score recompute
  44. 2026-09-15 14:51 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  45. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  46. 2026-09-14 13:53 UTCEG score recompute
  47. 2026-09-14 13:53 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  48. 2026-09-13 12:55 UTCEG score recompute
  49. 2026-09-13 12:55 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  50. 2026-09-12 11:57 UTCEG score recompute
  51. 2026-09-12 11:57 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  52. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  53. 2026-09-11 10:59 UTCEG score recompute
  54. 2026-09-11 10:59 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  55. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-09-10 09:33 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  57. 2026-09-09 08:33 UTCEG score recompute
  58. 2026-09-09 08:33 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  59. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  60. 2026-09-08 07:33 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  61. 2026-09-07 06:35 UTCEG score recompute
  62. 2026-09-07 06:35 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  63. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  64. 2026-09-06 05:36 UTCEG score recompute
  65. 2026-09-06 05:36 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  66. 2026-09-05 04:39 UTCEG score recompute
  67. 2026-09-05 04:39 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  68. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  69. 2026-09-04 03:41 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  70. 2026-09-03 02:43 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  71. 2026-09-02 01:40 UTCEG score recompute
  72. 2026-09-02 01:40 UTCGHSA enrichmentGHSA-vc6r-2f9f-w5j6 · GitHub CVSS 6.5
  73. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile

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Frequently asked(5)

What is CVE-2026-78323?
CVE-2026-78323 is a medium-severity vulnerability; its CVE record was published on August 24, 2026. A flaw was found in JSS (Java Security Services). The JSSTrustManager class does not verify NSS trust flags when validating CA certificates, allowing certificates present in the NSS database without TRUSTED_CA flags to be accepted as trust anchors for TLS connections. In non-default configurations…
When was CVE-2026-78323 made public?
CVE-2026-78323 was made public on August 24, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on August 24, 2026. EchelonGraph's copy of the record carries a last-modified date of August 28, 2026; the record at its source may have been updated since.
Is CVE-2026-78323 actively exploited?
CVE-2026-78323 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78323?
CVE-2026-78323 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78323?
No fix for CVE-2026-78323 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 vendor advisories EchelonGraph has for CVE-2026-78323 are linked in the Vendor Advisories panel on this page.

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