CVE-2026-59948

HIGHPre-NVD 7.07.0
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (5th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
7.0EG
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: 0.2%CVSS: 7.0Exploit: None knownExposed services: Not assessed

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 maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2.

CVSS v3
7.0
EG Score
7.0HIGHmedium confidence
EG Risk
32
EG Risk 32/100

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 (value × EchelonGraph’s weight)
Severity70% × 45%
The EG Score, 7.0 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. 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

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 advisoryMentions a patch (unverified)

Arbitrary file write outside vendor via malicious transitive package name · Advisory · composer/composer · GitHub

https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9
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-2026-59948(1)

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

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
composer2.0.11-1 ... 2.9.8-1 (96 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
composer2.10.0-1 ... 2.9.8-1 (57 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
composer2.10.0-1 ... 2.9.8-1 (26 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
composer2.10.0-1 ... 2.9.8-1 (21 versions)
  • every version up to 2.10.2-1: fixed in 2.10.2-1
—
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
composer/composer1.0.0 ... 2.2.9 (149 versions)
  • 2.3.0 up to 2.10.2: fixed in 2.10.2
  • 1.0.0 up to 2.2.29: fixed in 2.2.29
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 36× 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 100 of 147 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. None are among the latest 100 rows. The 47 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-13 15:45 UTCEG score recompute
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-12 15:52 UTCEG score recompute
  5. 2026-10-11 19:36 UTCEG score recompute
  6. 2026-10-11 16:51 UTCEG score recompute
  7. 2026-10-11 14:13 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-10-01 16:10 UTCEG score recompute
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-28 13:22 UTCEG score recompute
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
Show 75 more
  1. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-09-24 11:48 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-09-23 06:09 UTCEG score recompute
  5. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-09-18 05:43 UTCEG score recompute
  8. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-09-13 23:49 UTCEG score recompute
  13. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-09-12 15:06 UTCEG score recompute
  15. 2026-09-12 03:32 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-09-06 14:03 UTCEG score recompute
  21. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-09-05 22:47 UTCEG score recompute
  23. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  24. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  26. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  27. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  28. 2026-08-30 07:29 UTCEG score recompute
  29. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  30. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  31. 2026-08-27 21:50 UTCEG score recompute
  32. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  33. 2026-08-27 01:28 UTCEG score recompute
  34. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  35. 2026-08-26 08:22 UTCEG score recompute
  36. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  37. 2026-08-24 20:32 UTCEG score recompute
  38. 2026-08-23 02:51 UTCEG score recompute
  39. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  40. 2026-08-22 03:46 UTCEG score recompute
  41. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  42. 2026-08-21 03:59 UTCEG score recompute
  43. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  44. 2026-08-20 01:58 UTCEG score recompute
  45. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  46. 2026-08-18 22:28 UTCEG score recompute
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-08-17 22:28 UTCEG score recompute
  49. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  50. 2026-08-16 20:16 UTCEG score recompute
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  52. 2026-08-16 08:44 UTCEG score recompute
  53. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  54. 2026-08-15 09:41 UTCEG score recompute
  55. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  56. 2026-08-13 23:06 UTCEG score recompute
  57. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  58. 2026-08-13 00:01 UTCEG score recompute
  59. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  60. 2026-08-12 00:58 UTCEG score recompute
  61. 2026-08-11 01:55 UTCEG score recompute
  62. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  63. 2026-08-09 15:19 UTCEG score recompute
  64. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  65. 2026-08-09 03:48 UTCEG score recompute
  66. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  67. 2026-08-07 17:12 UTCEG score recompute
  68. 2026-08-06 18:08 UTCEG score recompute
  69. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  70. 2026-08-06 06:36 UTCEG score recompute
  71. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  72. 2026-08-04 19:55 UTCEG score recompute
  73. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  74. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  75. 2026-08-03 19:10 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-59948?
CVE-2026-59948 is a high-severity vulnerability; its CVE record was published on July 8, 2026. Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project…
When was the CVE record for CVE-2026-59948 published?
The CVE record for CVE-2026-59948 was published on July 8, 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 10, 2026; the record at its source may have been updated since.
Is CVE-2026-59948 actively exploited?
CVE-2026-59948 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59948?
CVE-2026-59948 has a CVSS base score of 7.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59948?
A fix for CVE-2026-59948 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59948 are linked in the Vendor Advisories panel on this page.

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