CVE-2026-9312

HIGHNVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

Score 8.2 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-27. NVD baseline CVSS 8.2; sources differ by 0.0.

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

Also known asEUVD-2026-32027 (ENISA EUVD) · GHSA-fwfp-h68w-2hcr (GitHub Security Advisories)Source: ENISA EUVD

8.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 9.2%CVSS: 8.2Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to send crafted requests to internal services by exploiting insufficient input validation in an upload endpoint. By injecting path traversal content into request parameters, an attacker could bypass the intended request flow and redirect internal API calls, potentially accessing internal services and exposing sensitive credentials. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.2. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
53
EG Risk 53/100

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)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
9.2%
EPSS %ILE
95th
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 (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
9.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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.Each input and its source: 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).

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

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.

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

May 27, 2026

Last Modified

July 23, 2026

Advisory Details (6)

Auto-updated May 31, 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#3.21.1
Web page

Release notes - GitHub Enterprise Server 3.20 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.20.4
Web page

Release notes - GitHub Enterprise Server 3.19 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.19.8
Web page

Release notes - GitHub Enterprise Server 3.18 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.18.11
Web page

Release notes - GitHub Enterprise Server 3.17 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.17.17
Web page

Release notes - GitHub Enterprise Server 3.16 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.16.20

Vendor Advisories for CVE-2026-9312(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 10× in last 7d / 42× 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 275 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 177 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-31 16:33 UTCEPSS rescoreEPSS 9.2% · 95th percentile
  2. 2026-10-30 16:35 UTCEPSS rescoreEPSS 9.2% · 95th percentile
  3. 2026-10-29 16:34 UTCEPSS rescoreEPSS 9.2% · 95th percentile
  4. 2026-10-28 16:33 UTCEPSS rescoreEPSS 9.2% · 95th percentile
  5. 2026-10-27 16:33 UTCEPSS rescoreEPSS 9.2% · 95th percentile
  6. 2026-10-26 16:33 UTCEPSS rescoreEPSS 9.2% · 95th percentile
  7. 2026-10-25 17:44 UTCEG score recompute
  8. 2026-10-25 17:44 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  9. 2026-10-25 16:34 UTCEPSS rescoreEPSS 9.2% · 95th percentile
  10. 2026-10-25 13:50 UTCEG score recompute
  11. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  12. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  13. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  14. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  15. 2026-10-20 20:19 UTCEG score recompute
  16. 2026-10-20 20:19 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  17. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  18. 2026-10-19 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  19. 2026-10-18 02:59 UTCEG score recompute
  20. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  21. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  22. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  23. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  24. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  25. 2026-10-13 04:30 UTCEG score recompute
Show 73 more
  1. 2026-10-13 04:29 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  3. 2026-10-12 14:43 UTCEG score recompute
  4. 2026-10-11 19:12 UTCEG score recompute
  5. 2026-10-11 16:28 UTCEG score recompute
  6. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  7. 2026-10-11 13:42 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  9. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  10. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  12. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  16. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  17. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  18. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  19. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  20. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  21. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  22. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-09-23 17:54 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  24. 2026-09-22 16:01 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  25. 2026-09-21 21:09 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  26. 2026-09-20 20:16 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  27. 2026-09-18 19:28 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  28. 2026-09-17 19:32 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  29. 2026-09-16 14:09 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  30. 2026-09-16 05:15 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  31. 2026-09-15 03:12 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  32. 2026-09-14 09:34 UTCEG score recompute
  33. 2026-09-14 09:34 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  34. 2026-09-13 16:48 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  35. 2026-09-12 15:02 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  36. 2026-09-11 14:53 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  37. 2026-09-11 09:38 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  38. 2026-09-10 09:35 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  39. 2026-09-08 22:01 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  40. 2026-09-06 13:48 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  41. 2026-09-05 15:31 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  42. 2026-09-04 05:07 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  43. 2026-09-02 14:12 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  44. 2026-09-01 13:54 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  45. 2026-09-01 04:40 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  46. 2026-08-30 19:18 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  47. 2026-08-30 01:22 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  48. 2026-08-28 21:42 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  49. 2026-08-27 14:25 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  50. 2026-08-26 14:47 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  51. 2026-08-25 13:49 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  52. 2026-08-24 14:18 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  53. 2026-08-23 15:53 UTCEG score recompute
  54. 2026-08-23 15:53 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  55. 2026-08-23 00:19 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  56. 2026-08-21 23:49 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  57. 2026-08-21 21:17 UTCEG score recompute
  58. 2026-08-21 21:17 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  59. 2026-08-20 22:56 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  60. 2026-08-20 17:56 UTCEG score recompute
  61. 2026-08-20 17:56 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  62. 2026-08-19 17:04 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  63. 2026-08-18 13:49 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  64. 2026-08-17 13:47 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  65. 2026-08-17 09:28 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  66. 2026-08-16 16:29 UTCEG score recompute
  67. 2026-08-16 16:29 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  68. 2026-08-16 14:56 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  69. 2026-08-16 03:01 UTCEG score recompute
  70. 2026-08-16 03:01 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2
  71. 2026-08-16 02:15 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  72. 2026-08-15 01:31 UTCEPSS rescoreEPSS 6.6% · 93rd percentile
  73. 2026-08-15 00:30 UTCGHSA enrichmentGHSA-fwfp-h68w-2hcr · GitHub severity CRITICAL · GitHub CVSS 8.2

Frequently asked(5)

What is CVE-2026-9312?
CVE-2026-9312 is a high-severity vulnerability; its CVE record was published on May 27, 2026. A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to send crafted requests to internal services by exploiting insufficient input validation in an upload endpoint. By injecting path traversal content into request…
When was the CVE record for CVE-2026-9312 published?
The CVE record for CVE-2026-9312 was published on May 27, 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 23, 2026; the record at its source may have been updated since.
Is CVE-2026-9312 actively exploited?
CVE-2026-9312 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.2% probability of exploitation in the next 30 days (95th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9312?
CVE-2026-9312 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-9312?
The CVE record for CVE-2026-9312 names the fix: "This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.2." The vendor advisories EchelonGraph has for CVE-2026-9312 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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