CVE-2026-42879

MEDIUMNVD 6.36.3
EchelonGraph scoreMEDIUM confidence

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

Score 6.3 from GitHub Security Advisory published 2026-05-07. NVD baseline CVSS 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
6.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.3Exploit: None knownExposed services: Not assessed

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

FacturaScripts is an open source accounting and invoicing software. In 2025.81 and earlier, an authenticated unrestricted file upload vulnerability exists in FacturaScripts' product image upload functionality. An attacker with valid credentials can upload a PHP file disguised as a GIF image (using a GIF89a header), bypassing MIME type validation. The file is stored with its original extension, including executable extensions such as .php. The vulnerability exists the addImageAction() method of Core/Lib/ExtendedController/ProductImagesTrait.php.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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)
Severity63% × 45%
The EG Score, 6.3 of 10.
Exploitation0.3% × 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
22nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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

May 27, 2026

Last Modified

May 27, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
No fix on record yet. Sources: github.
GitHub advisoryMentions a patch (unverified)

Unrestricted File Upload Allows Executable Extension Bypass in Product Image Upload · Advisory · NeoRazorX/facturascripts · GitHub

https://github.com/NeoRazorX/facturascripts/security/advisories/GHSA-vf3q-frmr-vrr9

Vendor Advisories for CVE-2026-42879(1)

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 / EcosystemFix (by version range) / PatchReleasedSource
composerfacturascripts/facturascripts—ghsa

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

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
facturascripts/facturascripts2018.03 ... v2025.81 (57 versions)
  • every version through 2025.81: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 26× 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 217 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 117 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 0.3% · 22nd percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  3. 2026-10-12 16:07 UTCEG score recompute
  4. 2026-10-11 19:48 UTCEG score recompute
  5. 2026-10-11 17:03 UTCEG score recompute
  6. 2026-10-11 14:29 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  15. 2026-10-03 16:49 UTCOSV refresh
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 75 more
  1. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-09-14 07:35 UTCEG score recompute
  3. 2026-09-14 07:35 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  4. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-09-13 03:09 UTCOSV refresh
  6. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  7. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  9. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-08-25 05:11 UTCEG score recompute
  21. 2026-08-25 05:11 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  22. 2026-08-23 14:54 UTCEG score recompute
  23. 2026-08-23 14:54 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  24. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-08-21 20:30 UTCEG score recompute
  27. 2026-08-21 20:30 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  28. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-08-20 11:14 UTCEG score recompute
  30. 2026-08-20 11:14 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  31. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  32. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  33. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  34. 2026-08-17 09:13 UTCEG score recompute
  35. 2026-08-17 09:13 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  36. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  37. 2026-08-16 05:28 UTCEG score recompute
  38. 2026-08-16 05:28 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  39. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  40. 2026-08-15 03:27 UTCEG score recompute
  41. 2026-08-15 03:27 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  42. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  43. 2026-08-14 01:24 UTCEG score recompute
  44. 2026-08-14 01:24 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  45. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  46. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-12 10:42 UTCEG score recompute
  48. 2026-08-12 10:42 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  49. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  50. 2026-08-11 08:23 UTCEG score recompute
  51. 2026-08-11 08:23 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  52. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  53. 2026-08-10 06:19 UTCEG score recompute
  54. 2026-08-10 06:19 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  55. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  56. 2026-08-09 04:17 UTCEG score recompute
  57. 2026-08-09 04:17 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  58. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  59. 2026-08-08 02:15 UTCEG score recompute
  60. 2026-08-08 02:15 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  61. 2026-08-07 00:14 UTCEG score recompute
  62. 2026-08-07 00:14 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  63. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  64. 2026-08-05 20:51 UTCEG score recompute
  65. 2026-08-05 20:51 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  66. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  67. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  68. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  69. 2026-08-03 19:11 UTCEG score recompute
  70. 2026-08-03 19:11 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  71. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  72. 2026-08-02 17:09 UTCEG score recompute
  73. 2026-08-02 17:09 UTCGHSA enrichmentGHSA-vf3q-frmr-vrr9 · GitHub CVSS 6.3
  74. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  75. 2026-08-01 15:07 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-42879?
CVE-2026-42879 is a medium-severity vulnerability; its CVE record was published on May 27, 2026. FacturaScripts is an open source accounting and invoicing software. In 2025.81 and earlier, an authenticated unrestricted file upload vulnerability exists in FacturaScripts' product image upload functionality. An attacker with valid credentials can upload a PHP file disguised as a GIF image (using…
When was the CVE record for CVE-2026-42879 published?
The CVE record for CVE-2026-42879 was published on May 27, 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 May 27, 2026; the record at its source may have been updated since.
Is CVE-2026-42879 actively exploited?
CVE-2026-42879 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42879?
CVE-2026-42879 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-42879?
No fix for CVE-2026-42879 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-42879 are linked in the Vendor Advisories panel on this page.

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