CVE-2026-9312

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

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, ghsa, nvd
Trending — 3 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 7%CVSS: 8.2Exploit: None knownExposed: 0

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

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
8.2(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity82% × 45%
Exploitation7% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
7%
EPSS %ILE
93%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 23, 2026

Advisory Details (6)

Auto-updated May 31, 2026
No patch confirmed yet.
generic

Release notes - GitHub Enterprise Server 3.21 Docs

https://docs.github.com/en/[email protected]/admin/release-notes#3.21.1
generic

Release notes - GitHub Enterprise Server 3.20 Docs

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

Release notes - GitHub Enterprise Server 3.19 Docs

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

Release notes - GitHub Enterprise Server 3.18 Docs

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

Release notes - GitHub Enterprise Server 3.17 Docs

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

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 9× in last 7d / 36× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 222 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9312?
CVE-2026-9312 is a high vulnerability 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 CVE-2026-9312 disclosed?
CVE-2026-9312 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9312 actively exploited?
CVE-2026-9312 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7% probability of exploitation in the next 30 days, which ranks it in the top 6.6% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9312, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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