CVE-2026-18967

HIGHNVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.2% (14th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 6.4 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-08-06) is not newer than that change (2026-08-10), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-53716 (ENISA EUVD) · GHSA-fghp-hcwh-75j2 (GitHub Security Advisories)Source: ENISA EUVD

8.1EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.1Exploit: 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 the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity81% × 45%
Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (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: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.2%
EPSS %ILE
14th
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 (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.

EG Severity
8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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; Track* at high (mission-essential systems).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: 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 6, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
No fix on record yet. Sources: redhat.
Red HatMentions a patch (unverified)

CVE-2026-18967 - 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-2026-18967

Vendor Advisories for CVE-2026-18967(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 9× in last 7d / 49× 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 238 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 138 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-11-01 00:14 UTCEG score recompute
  3. 2026-11-01 00:14 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  4. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-10-25 14:44 UTCEG score recompute
  12. 2026-10-24 21:01 UTCEG score recompute
  13. 2026-10-24 21:01 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  14. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-10-18 03:58 UTCEG score recompute
  22. 2026-10-17 17:46 UTCEG score recompute
  23. 2026-10-17 17:46 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  24. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 75 more
  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-10-12 16:26 UTCEG score recompute
  6. 2026-10-11 20:07 UTCEG score recompute
  7. 2026-10-11 17:19 UTCEG score recompute
  8. 2026-10-11 14:52 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-10-06 23:35 UTCEG score recompute
  15. 2026-10-06 23:35 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  16. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-10-05 19:31 UTCEG score recompute
  18. 2026-10-05 19:31 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  19. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-10-04 23:28 UTCEG score recompute
  21. 2026-10-04 23:28 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  22. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-10-04 05:56 UTCEG score recompute
  24. 2026-10-04 05:56 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  25. 2026-10-03 01:07 UTCEG score recompute
  26. 2026-10-03 01:07 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  27. 2026-10-02 09:49 UTCEG score recompute
  28. 2026-10-02 09:49 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  29. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  30. 2026-10-01 14:27 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  31. 2026-10-01 01:50 UTCEG score recompute
  32. 2026-10-01 01:50 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  33. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  34. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  35. 2026-09-29 06:06 UTCEG score recompute
  36. 2026-09-29 06:06 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  37. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  38. 2026-09-28 06:10 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  39. 2026-09-27 17:37 UTCEG score recompute
  40. 2026-09-27 17:37 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  41. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  42. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  43. 2026-09-25 04:28 UTCEG score recompute
  44. 2026-09-25 04:28 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  45. 2026-09-24 04:44 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  46. 2026-09-23 16:11 UTCEG score recompute
  47. 2026-09-23 16:11 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  48. 2026-09-23 02:52 UTCEG score recompute
  49. 2026-09-23 02:52 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  50. 2026-09-22 14:19 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  51. 2026-09-22 01:35 UTCEG score recompute
  52. 2026-09-22 01:35 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  53. 2026-09-21 13:01 UTCEG score recompute
  54. 2026-09-21 13:01 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  55. 2026-09-20 10:59 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  56. 2026-09-19 21:42 UTCEG score recompute
  57. 2026-09-19 21:42 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  58. 2026-09-19 07:33 UTCEG score recompute
  59. 2026-09-19 07:33 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  60. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  61. 2026-09-18 17:38 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  62. 2026-09-18 03:52 UTCEG score recompute
  63. 2026-09-18 03:52 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  64. 2026-09-17 15:19 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  65. 2026-09-17 01:03 UTCEG score recompute
  66. 2026-09-17 01:03 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  67. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  68. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  69. 2026-09-16 05:11 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  70. 2026-09-15 16:07 UTCEG score recompute
  71. 2026-09-15 16:07 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  72. 2026-09-15 01:43 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  73. 2026-09-14 13:09 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4
  74. 2026-09-14 00:35 UTCEG score recompute
  75. 2026-09-14 00:35 UTCGHSA enrichmentGHSA-fghp-hcwh-75j2 · GitHub CVSS 6.4

Frequently asked(5)

What is CVE-2026-18967?
CVE-2026-18967 is a high-severity vulnerability; its CVE record was published on August 6, 2026. A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion…
When was CVE-2026-18967 made public?
CVE-2026-18967 was made public on July 31, 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 6, 2026. EchelonGraph's copy of the record carries a last-modified date of August 10, 2026; the record at its source may have been updated since.
Is CVE-2026-18967 actively exploited?
CVE-2026-18967 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18967?
CVE-2026-18967 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-18967?
No fix for CVE-2026-18967 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-2026-18967 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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