CVE-2026-15007

MEDIUMPre-NVD 5.75.7
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (50th 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
Trending — 3 sources updated this week

Also known asEUVD-2026-45188 (ENISA EUVD) · GHSA-x3vv-vhr6-576j (GitHub Security Advisories)Source: ENISA EUVD

5.7EG
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: 0.6%CVSS: 5.7Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to cause service disruption by supplying a repository release notes configuration file containing deeply nested YAML. When release notes were generated, the configuration file was parsed without a nesting depth limit, causing excessive resource consumption that could render the instance unresponsive. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS v3
5.7
EG Score
5.7MEDIUMmedium confidence
EG Risk
26
EG Risk 26/100

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)
Severity57% × 45%
Impact severity (EG Severity): CVSS 5.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.6% × 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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
50th
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 (5.7): severity, escalated by confirmed exploitation. This CVE's 5.7 is its impact severity (EG Severity), not escalated.

EG Severity
5.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

The CVE record names the fixed release. Apply it within your standard update timelines.

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 17, 2026

Last Modified

October 24, 2026

Advisory Details (5)

Auto-updated Jul 17, 2026
Fix named in the CVE record.
Web page

Release notes - GitHub Enterprise Server 3.21 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.21.3
Web page

Release notes - GitHub Enterprise Server 3.20 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.20.5
Web page

Release notes - GitHub Enterprise Server 3.19 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.19.9
Web page

Release notes - GitHub Enterprise Server 3.18 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.18.12
Web page

Release notes - GitHub Enterprise Server 3.17 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.17.18

Vendor Advisories for CVE-2026-15007(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 / 43× 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 191 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 91 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  2. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  3. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.6% · 50th percentile
  4. 2026-10-25 14:47 UTCEG score recompute
  5. 2026-10-24 20:29 UTCEG score recompute
  6. 2026-10-24 20:29 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  7. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  8. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  9. 2026-10-23 06:28 UTCEG score recompute
  10. 2026-10-23 06:28 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  11. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  12. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  13. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  14. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  15. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  16. 2026-10-18 05:01 UTCEG score recompute
  17. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  18. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  19. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  20. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  21. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  22. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  23. 2026-10-12 16:33 UTCEG score recompute
  24. 2026-10-11 20:10 UTCEG score recompute
  25. 2026-10-11 17:22 UTCEG score recompute
Show 75 more
  1. 2026-10-11 14:55 UTCEG score recompute
  2. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  3. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  4. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  5. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  6. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  7. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  8. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  9. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  10. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  12. 2026-10-01 10:29 UTCEG score recompute
  13. 2026-10-01 10:29 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  14. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  16. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-09-28 07:55 UTCEG score recompute
  18. 2026-09-28 07:55 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  19. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  21. 2026-09-24 04:36 UTCEG score recompute
  22. 2026-09-24 04:36 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  23. 2026-09-23 02:29 UTCEG score recompute
  24. 2026-09-23 02:29 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  26. 2026-09-18 11:13 UTCEG score recompute
  27. 2026-09-18 11:13 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  28. 2026-09-17 10:15 UTCEG score recompute
  29. 2026-09-17 10:15 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  30. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  31. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  32. 2026-09-14 06:59 UTCEG score recompute
  33. 2026-09-14 06:59 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  34. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  35. 2026-09-13 06:01 UTCEG score recompute
  36. 2026-09-13 06:01 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  37. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  38. 2026-09-11 21:07 UTCEG score recompute
  39. 2026-09-11 21:07 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  40. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  41. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  42. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  43. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  44. 2026-09-08 00:01 UTCEG score recompute
  45. 2026-09-08 00:01 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  46. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  47. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  48. 2026-09-05 20:27 UTCEG score recompute
  49. 2026-09-05 20:27 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  50. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  51. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  52. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  53. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  54. 2026-08-31 04:29 UTCEG score recompute
  55. 2026-08-31 04:29 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  56. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  57. 2026-08-30 03:19 UTCEG score recompute
  58. 2026-08-30 03:19 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  59. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  60. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  61. 2026-08-27 23:52 UTCEG score recompute
  62. 2026-08-27 23:52 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  63. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  64. 2026-08-26 22:38 UTCEG score recompute
  65. 2026-08-26 22:38 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  66. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  67. 2026-08-25 20:22 UTCEG score recompute
  68. 2026-08-25 20:22 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  69. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  70. 2026-08-24 19:15 UTCEG score recompute
  71. 2026-08-24 19:15 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  72. 2026-08-23 15:58 UTCEG score recompute
  73. 2026-08-23 15:58 UTCGHSA enrichmentGHSA-x3vv-vhr6-576j
  74. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  75. 2026-08-22 15:00 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-15007?
CVE-2026-15007 is a medium-severity vulnerability; its CVE record was published on July 17, 2026. A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to cause service disruption by supplying a repository release notes configuration file containing deeply nested YAML. When release notes were generated, the configuration file was parsed…
When was the CVE record for CVE-2026-15007 published?
The CVE record for CVE-2026-15007 was published on July 17, 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 24, 2026; the record at its source may have been updated since.
Is CVE-2026-15007 actively exploited?
CVE-2026-15007 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15007?
CVE-2026-15007 has a CVSS base score of 5.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15007?
The CVE record for CVE-2026-15007 names the fix: "This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3." The vendor advisories EchelonGraph has for CVE-2026-15007 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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