CVE-2026-59946

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

A fix is available — apply it.

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and world-executable mode during composer install, update, or require. This issue is fixed in versions 2.2.29 and 2.10.2.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 10, 2026

Advisory Details (5)

Auto-updated Jul 8, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Path traversal in package bin field lets dependencies chmod arbitrary host files · Advisory · composer/composer · GitHub

Affected: 2.2.29 (2.2 LTS line) and 2.10.2 (current 2.x line). Composer 1.x is end of life

https://github.com/composer/composer/security/advisories/GHSA-gjfg-22fp-rrxx
github_release Patch Available

2.2.29

Patch available: composer/composer 2.2.29

https://github.com/composer/composer/releases/tag/2.2.29
github_release Patch Available

2.10.2

Patch available: composer/composer 2.10.2

https://github.com/composer/composer/releases/tag/2.10.2
github_commit Patch Available

commit c50b1efd13eb (composer/composer)

Patch available: composer/composer 2.2.29 (contains commit c50b1efd13eb)

https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1
github_commit Patch Available

commit 502c6c4f6998 (composer/composer)

Patch available: composer/composer 2.10.2 (contains commit 502c6c4f6998)

https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0

Vendor Advisories for CVE-2026-59946(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcomposer-main-2.10.2-1.hum12026-07-02redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
composer2.0.11-1 ... 2.9.8-1 (96 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
composer2.10.0-1 ... 2.9.8-1 (56 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
composer2.10.0-1 ... 2.9.8-1 (25 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
composer2.10.0-1 ... 2.9.8-1 (21 versions)2.10.2-1—
Packagist(1)
PackageVulnerable rangeFixed inDependents
composer/composer1.0.0 ... 2.2.9 (149 versions)2.2.29—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 83× 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 126 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-59946?
CVE-2026-59946 is a medium vulnerability published on July 8, 2026. Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and…
When was CVE-2026-59946 disclosed?
CVE-2026-59946 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59946 actively exploited?
CVE-2026-59946 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.2% of all scored CVEs.
What is the CVSS score of CVE-2026-59946?
CVE-2026-59946 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-59946?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59946, 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.

Dependency Blast Radius

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