CVE-2026-27964

LOWNVD 3.93.9—
EchelonGraph scoreMEDIUM confidence

Score 3.9 from GitHub Security Advisory (severity: LOW) published 2026-05-07. NVD baseline CVSS 3.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
3.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.9Exploit: Elevated riskExposed: 0

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

FacturaScripts is an open source accounting and invoicing software. Versions 2025.7 and prior contain a Reflected Cross-Site Scripting (XSS) vulnerability through the fsNick cookie parameter. The application reflects the cookie's value directly into the HTML without sanitization. The fsNick cookie is rendered into the DOM without encoding. While the server does reject the modified session and forces a logout, the HTML containing the payload reaches the browser first. This lets the script execute immediately upon load, effectively beating the redirect. This issue has been fixed in version 2025.8.

CVSS v3
3.9
EG Score
3.9(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity39% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

May 18, 2026

Last Modified

July 24, 2026

References (3)

Vendor Advisories for CVE-2026-27964(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 / EcosystemFixed in / 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 rangeFixed inDependents
facturascripts/facturascripts2018.03 ... v2025.8 (56 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 32× 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 156 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-27964?
CVE-2026-27964 is a low vulnerability published on May 18, 2026. FacturaScripts is an open source accounting and invoicing software. Versions 2025.7 and prior contain a Reflected Cross-Site Scripting (XSS) vulnerability through the fsNick cookie parameter. The application reflects the cookie's value directly into the HTML without sanitization. The fsNick cookie…
When was CVE-2026-27964 disclosed?
CVE-2026-27964 was first published in the National Vulnerability Database on May 18, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27964 actively exploited?
CVE-2026-27964 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 98.9% of all scored CVEs.
What is the CVSS score of CVE-2026-27964?
CVE-2026-27964 has a CVSS v3 base score of 3.9 (NVD).
How do I remediate CVE-2026-27964?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27964, 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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