CVE-2026-73621

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-08-13. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

GitPython before 3.1.56 contains an argument injection vulnerability in the Commit.count() method, which forwards keyword arguments to 'git rev-list' without the check_unsafe_options guard present in the sibling iter_items method. An attacker who can control options passed to Commit.count (e.g., via an application that forwards a user-supplied options dict) can supply output=, causing 'git rev-list --output=' to open and truncate the target file to zero bytes before revision parsing. This allows destruction/blanking of an arbitrary file at the process's privilege level (no content control, 0-byte truncation).

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA 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
Severity54% × 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
27th
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 13, 2026

Last Modified

September 3, 2026

Advisory Details (2)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

GitPython before 3.1.56 Arbitrary File Truncation via Commit.count | Advisories | VulnCheck

https://www.vulncheck.com/advisories/gitpython-before-arbitrary-file-truncation-via-commit-count
github Patch Available🟡 PoC Available

Arbitrary file truncation via git rev-list --output argument injection in unguarded Commit.count · Advisory · gitpython-developers/GitPython · GitHub

https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-p538-c434-8v24

Vendor Advisories for CVE-2026-73621(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
python-git3.1.30-1 ... 3.1.62-2 (13 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-git3.1.44-1 ... 3.1.62-2 (7 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-git3.1.44-1, 3.1.45-1, 3.1.46-1, 3.1.50-1
  • every version up to 3.1.61-1: fixed in 3.1.61-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
gitpython0.1.7 ... 3.1.9 (108 versions)
  • every version up to 3.1.56: fixed in 3.1.56
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 68× 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 141 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73621?
CVE-2026-73621 is a medium vulnerability published on August 13, 2026. GitPython before 3.1.56 contains an argument injection vulnerability in the Commit.count() method, which forwards keyword arguments to 'git rev-list' without the checkunsafeoptions guard present in the sibling iter_items method. An attacker who can control options passed to Commit.count (e.g., via…
When was CVE-2026-73621 disclosed?
CVE-2026-73621 was first published on August 13, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73621 actively exploited?
CVE-2026-73621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73621?
CVE-2026-73621 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73621?
A fix for CVE-2026-73621 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73621 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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