CVE-2026-61873

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-15. The CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (VulnCheck) lists getgrav grav versions before 9.1.8 as affected, and getgrav grav versions 9.1.8 as unaffected. No release containing a fix is confirmed on record.

Grav before 9.1.8 contains an arbitrary file write vulnerability in the Form plugin's process.save.filename parameter, which is validated against path traversal before Twig processing but never re-validated after rendering. Attackers can submit form data containing path traversal sequences that are processed through Twig templates, allowing them to write arbitrary files including PHP webshells to the web root or other sensitive directories.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (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
0.5%
EPSS %ILE
38th
KEV
Not listed

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

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 public PoC (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

July 15, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
No fix on record yet. Sources: github.
Web page

Grav before 9.1.8 Arbitrary File Write via Twig-Processed Filename | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-twig-processed-filename
GitHub advisoryMentions a patch (unverified)

Arbitrary File Write via Twig-Processed Filename -TOCTOU in Form `process.save.filename` · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-q532-mvx7-42qg

Vendor Advisories for CVE-2026-61873(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 37× 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 216 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 116 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 0.5% · 38th percentile
  2. 2026-10-13 13:17 UTCEG score recompute
  3. 2026-10-13 13:17 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  5. 2026-10-12 15:50 UTCEG score recompute
  6. 2026-10-11 19:34 UTCEG score recompute
  7. 2026-10-11 16:49 UTCEG score recompute
  8. 2026-10-11 14:11 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-10-01 12:42 UTCEG score recompute
  21. 2026-10-01 12:42 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  24. 2026-09-28 08:46 UTCEG score recompute
  25. 2026-09-28 08:46 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  2. 2026-09-24 08:54 UTCEG score recompute
  3. 2026-09-24 08:54 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  4. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  5. 2026-09-23 03:20 UTCEG score recompute
  6. 2026-09-23 03:20 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  7. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-09-18 04:46 UTCEG score recompute
  10. 2026-09-18 04:46 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  11. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-09-13 23:13 UTCEG score recompute
  14. 2026-09-13 23:13 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  15. 2026-09-13 07:17 UTCEG score recompute
  16. 2026-09-13 07:17 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  17. 2026-09-12 13:04 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  18. 2026-09-11 21:47 UTCEG score recompute
  19. 2026-09-11 21:47 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  20. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-09-08 00:57 UTCEG score recompute
  24. 2026-09-08 00:56 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  25. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  26. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  27. 2026-09-06 13:29 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  28. 2026-09-05 20:52 UTCEG score recompute
  29. 2026-09-05 20:52 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  30. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  31. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  32. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  33. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  34. 2026-08-31 05:24 UTCEG score recompute
  35. 2026-08-31 05:24 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  37. 2026-08-30 16:38 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  38. 2026-08-30 03:54 UTCEG score recompute
  39. 2026-08-30 03:54 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  40. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  41. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  42. 2026-08-28 03:00 UTCEG score recompute
  43. 2026-08-28 03:00 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  44. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  45. 2026-08-27 14:16 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  46. 2026-08-27 01:30 UTCEG score recompute
  47. 2026-08-27 01:30 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  48. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  49. 2026-08-26 12:45 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  50. 2026-08-25 23:55 UTCEG score recompute
  51. 2026-08-25 23:55 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  52. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  53. 2026-08-25 09:32 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  54. 2026-08-24 20:48 UTCEG score recompute
  55. 2026-08-24 20:48 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  56. 2026-08-24 08:04 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  57. 2026-08-23 19:15 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  58. 2026-08-23 06:31 UTCEG score recompute
  59. 2026-08-23 06:31 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  60. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  61. 2026-08-22 17:44 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  62. 2026-08-22 04:59 UTCEG score recompute
  63. 2026-08-22 04:59 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  64. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  65. 2026-08-21 16:14 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  66. 2026-08-21 03:29 UTCEG score recompute
  67. 2026-08-21 03:29 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  68. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  69. 2026-08-20 14:38 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  70. 2026-08-20 01:02 UTCEG score recompute
  71. 2026-08-20 01:01 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  72. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  73. 2026-08-19 11:55 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1
  74. 2026-08-18 23:01 UTCEG score recompute
  75. 2026-08-18 23:01 UTCGHSA enrichmentGHSA-m8gp-46r6-rc3f · GitHub severity HIGH · GitHub CVSS 8.1

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-61873?
CVE-2026-61873 is a high-severity vulnerability; its CVE record was published on July 15, 2026. Grav before 9.1.8 contains an arbitrary file write vulnerability in the Form plugin's process.save.filename parameter, which is validated against path traversal before Twig processing but never re-validated after rendering. Attackers can submit form data containing path traversal sequences that are…
When was CVE-2026-61873 made public?
CVE-2026-61873 was made public on June 26, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 15, 2026. EchelonGraph's copy of the record carries a last-modified date of July 28, 2026; the record at its source may have been updated since.
Is CVE-2026-61873 actively exploited?
CVE-2026-61873 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-61873?
CVE-2026-61873 has a CVSS base score of 8.1 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-61873?
No fix for CVE-2026-61873 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 CVE record's CNA (VulnCheck) lists getgrav grav versions before 9.1.8 as affected, and getgrav grav versions 9.1.8 as unaffected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-61873 are linked in the Vendor Advisories panel on this page.

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