CVE-2026-76839

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated
6.5EG
EchelonGraph verdictPlan a fixRemediate 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: 0.3%CVSS: 6.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Grav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet() and offsetexists() methods that lack field filtering. Attackers with page-edit permissions can call offsetGet() on User objects to extract hashed passwords and 2FA secrets, enabling offline password cracking and authentication bypass.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100

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)
Severity65% × 45%
The EG Score, 6.5 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
25th
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 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

August 25, 2026

Last Modified

October 12, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
Patch available. Sources: github.
Web page

Grav before 2.0.16 Information Disclosure via offsetGet | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-information-disclosure-via-offsetget
GitHub advisoryMentions a patch (unverified)

UserInterface offsetget/offsetexists allow-listed in Twig sandbox let editor-authored content leak hashed_password and 2FA secrets via offsetGet() · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx

Vendor Advisories for CVE-2026-76839(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
getgrav/grav0.8.0 ... 2.0.9 (350 versions)
  • every version up to 2.0.16: fixed in 2.0.16
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 60× 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 98 of 118 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 20 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-12 15:29 UTCEG score recompute
  4. 2026-10-11 19:23 UTCEG score recompute
  5. 2026-10-11 16:39 UTCEG score recompute
  6. 2026-10-11 13:58 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-10-10 12:25 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-08 16:36 UTCEG score recompute
  13. 2026-10-08 15:41 UTCEG score recompute
  14. 2026-10-08 03:43 UTCEG score recompute
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-10-07 01:10 UTCEG score recompute
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-06 02:42 UTCEG score recompute
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-10-05 01:25 UTCEG score recompute
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-10-04 02:16 UTCEG score recompute
  23. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-10-03 02:01 UTCEG score recompute
  25. 2026-10-02 03:50 UTCEG score recompute
Show 73 more
  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-10-01 05:37 UTCEG score recompute
  3. 2026-09-30 06:55 UTCEG score recompute
  4. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  5. 2026-09-28 21:31 UTCEG score recompute
  6. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  7. 2026-09-27 20:24 UTCEG score recompute
  8. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-09-26 22:12 UTCEG score recompute
  10. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-09-24 19:19 UTCEG score recompute
  13. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-09-23 21:09 UTCEG score recompute
  15. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  16. 2026-09-22 22:59 UTCEG score recompute
  17. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-09-22 00:49 UTCEG score recompute
  19. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  20. 2026-09-21 02:39 UTCEG score recompute
  21. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-09-20 04:29 UTCEG score recompute
  23. 2026-09-19 06:18 UTCEG score recompute
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  25. 2026-09-18 08:07 UTCEG score recompute
  26. 2026-09-17 09:57 UTCEG score recompute
  27. 2026-09-17 09:57 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  28. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  29. 2026-09-16 11:46 UTCEG score recompute
  30. 2026-09-16 11:46 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  31. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  32. 2026-09-15 13:36 UTCEG score recompute
  33. 2026-09-15 13:36 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  34. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  35. 2026-09-14 15:25 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  36. 2026-09-13 17:10 UTCEG score recompute
  37. 2026-09-13 17:10 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  38. 2026-09-12 19:00 UTCEG score recompute
  39. 2026-09-12 19:00 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  40. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  41. 2026-09-11 20:50 UTCEG score recompute
  42. 2026-09-11 20:50 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  43. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  44. 2026-09-10 22:31 UTCEG score recompute
  45. 2026-09-10 22:31 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  46. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  47. 2026-09-10 00:20 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  48. 2026-09-09 01:19 UTCEG score recompute
  49. 2026-09-09 01:19 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  50. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  51. 2026-09-07 11:47 UTCEG score recompute
  52. 2026-09-07 11:46 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  53. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  54. 2026-09-06 13:33 UTCEG score recompute
  55. 2026-09-06 13:33 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  56. 2026-09-05 15:23 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  57. 2026-09-04 17:13 UTCEG score recompute
  58. 2026-09-04 17:13 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  59. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  60. 2026-09-03 19:02 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  61. 2026-09-02 20:45 UTCEG score recompute
  62. 2026-09-02 20:45 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  63. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  64. 2026-09-01 19:12 UTCEG score recompute
  65. 2026-09-01 19:12 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  66. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  67. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  68. 2026-08-31 20:55 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  69. 2026-08-31 05:33 UTCEG score recompute
  70. 2026-08-31 05:33 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5
  71. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  72. 2026-08-30 07:22 UTCEG score recompute
  73. 2026-08-30 07:22 UTCGHSA enrichmentGHSA-8vp7-8q4w-vv7m · GitHub severity HIGH · GitHub CVSS 6.5

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-76839?
CVE-2026-76839 is a medium-severity vulnerability; its CVE record was published on August 25, 2026. Grav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet() and offsetexists() methods that lack field filtering. Attackers with page-edit permissions can call offsetGet() on User objects to extract hashed passwords and 2FA secrets, enabling…
When was CVE-2026-76839 made public?
CVE-2026-76839 was made public on August 10, 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 August 25, 2026. EchelonGraph's copy of the record carries a last-modified date of October 12, 2026; the record at its source may have been updated since.
Is CVE-2026-76839 actively exploited?
CVE-2026-76839 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76839?
CVE-2026-76839 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-76839?
A fix for CVE-2026-76839 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76839 are linked in the Vendor Advisories panel on this page.

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