CVE-2026-53584

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (33rd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, libgit2 does not reject traversal components in a submodule path loaded from .gitmodules. The affected src/libgit2/submodule.c paths include git_submodule_lookup and git_submodule_add_setup. A crafted repository can specify a path such as ../escape-target, and applications that initialize the submodule can create directories outside the repository working tree. This issue is fixed in versions 1.8.6 and 1.9.5.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100CISA SSVC

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
33rd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 20, 2026

Last Modified

September 9, 2026

Advisory Details (6)

Auto-updated Aug 20, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

libgit2 v1.9.5

Patch available: libgit2/libgit2 v1.9.5

https://github.com/libgit2/libgit2/releases/tag/v1.9.5
github_release Patch Available

libgit2 v1.8.6

Patch available: libgit2/libgit2 v1.8.6

https://github.com/libgit2/libgit2/releases/tag/v1.8.6
github_commit Patch Available

commit ec7371da9f35 (libgit2/libgit2)

Patch available: libgit2/libgit2 v1.9.5 (contains commit ec7371da9f35)

https://github.com/libgit2/libgit2/commit/ec7371da9f359cd8293e9108e7a0b1c1b61b67c4
github_commit

commit 467c2d95ed66 (libgit2/libgit2)

Fix landed in libgit2/libgit2 commit 467c2d95ed66 — awaiting tagged release

https://github.com/libgit2/libgit2/commit/467c2d95ed663df722f83a5960edf568514b128c
github_commit Patch Available

commit 419637d35873 (libgit2/libgit2)

Patch available: libgit2/libgit2 v1.8.6 (contains commit 419637d35873)

https://github.com/libgit2/libgit2/commit/419637d3587396f5d139d6d88480eab3cd81e7a1
githubMentions a patch (unverified)

Submodule path traversal · Advisory · libgit2/libgit2 · GitHub

https://github.com/libgit2/libgit2/security/advisories/GHSA-cw77-j82w-mchm

Vendor Advisories for CVE-2026-53584(2)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibgit2-dev (0.26.0+dfsg.1-1.1ubuntu0.2+esm2) @ bionic2026-10-09ubuntu
redhatlibgit2-main-1.9.7-1.hum12026-08-25redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libgit21.5.1+ds-1 ... 1.9.7+ds-1 (32 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libgit21.9.0+ds-2
  • every version up to 1.9.0+ds-2+deb13u1: fixed in 1.9.0+ds-2+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libgit21.9.0+ds-2 ... 1.9.4+ds-1 (13 versions)
  • every version up to 1.9.6+ds-1: fixed in 1.9.6+ds-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 21× in last 7d / 76× 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 136 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-53584?
CVE-2026-53584 is a medium vulnerability published on August 20, 2026. libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, libgit2 does not reject traversal components in a submodule path loaded from .gitmodules. The affected…
When was CVE-2026-53584 disclosed?
CVE-2026-53584 was first published on August 20, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53584 actively exploited?
CVE-2026-53584 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53584?
CVE-2026-53584 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53584?
A fix for CVE-2026-53584 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53584 are linked in the Vendor Advisories panel on this page.

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