CVE-2026-107845

CRITICALPre-NVD 9.39.3
EchelonGraph scoreMEDIUM confidence

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

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-09. A secondary CVSS source baseline 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-95975 (ENISA EUVD) · GHSA-628f-v4f6-p37r (GitHub Security Advisories)Source: ENISA EUVD

9.3EG
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: 0.3%CVSS: 9.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, an unauthenticated visitor can submit a comment whose email or website metadata is rendered without sufficient attribute and URL encoding by listComments() in comments-bundle/contao/dca/tl_comments.php. When a backend user opens the Comments module, attacker-controlled script can execute in the Contao backend origin under that user's session. Unpublished comments remain visible to moderators, so moderation does not prevent exposure. This issue is fixed in versions 5.3.50 and 5.7.12.

CVSS v3
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
42
EG Risk 42/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity93% × 45%
Impact severity (EG Severity): CVSS 9.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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 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
0.3%
EPSS %ILE
20th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.

EG Severity
9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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.

The score's inputs: 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

October 9, 2026

Last Modified

October 16, 2026

Advisory Details (2)

Auto-updated Oct 9, 2026
Patch available. Sources: github, github_commit.
GitHub commit

commit 22505d5f79bc (contao/contao)

Fix landed in contao/contao commit 22505d5f79bc — awaiting tagged release

https://github.com/contao/contao/commit/22505d5f79bc1a7f52e2cba5fddf6007e1f0408a
GitHub advisoryMentions a patch (unverified)

Cross-site scripting in the comments bundle · Advisory · contao/contao · GitHub

https://github.com/contao/contao/security/advisories/GHSA-628f-v4f6-p37r

Vendor Advisories for CVE-2026-107845(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composercontao/comments-bundle @ 5.3.50 (fixes >= 4.0.0, < 5.3.50)—ghsa
composercontao/comments-bundle @ 5.7.12 (fixes >= 5.4.0-RC1, < 5.7.12)—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
contao/comments-bundle5.4.0 ... 5.7.9 (71 versions)
  • 4.0.0 up to 5.3.50: fixed in 5.3.50
  • 5.4.0-RC1 up to 5.7.12: fixed in 5.7.12
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 44× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-11-12 23:38 UTCEchelonGraph re-scored
  3. 2026-11-12 23:38 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  4. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-11-11 23:02 UTCEchelonGraph re-scored
  6. 2026-11-11 23:02 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  7. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-11-10 22:26 UTCEchelonGraph re-scored
  9. 2026-11-10 22:26 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  10. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-11-09 21:31 UTCEchelonGraph re-scored
  12. 2026-11-09 21:31 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  13. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-11-08 20:55 UTCEchelonGraph re-scored
  15. 2026-11-08 20:55 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  16. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-11-08 11:08 UTCEchelonGraph re-scored
  18. 2026-11-08 11:08 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  19. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-11-07 10:31 UTCEchelonGraph re-scored
  21. 2026-11-07 10:31 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  22. 2026-11-06 16:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-11-06 09:55 UTCEchelonGraph re-scored
  24. 2026-11-06 09:55 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  25. 2026-11-05 22:25 UTCOSV refresh
Show 68 more
  1. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-11-05 09:19 UTCEchelonGraph re-scored
  3. 2026-11-05 09:19 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  4. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-11-04 08:43 UTCEchelonGraph re-scored
  6. 2026-11-04 08:43 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  7. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-11-03 08:07 UTCEchelonGraph re-scored
  9. 2026-11-03 08:07 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  10. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-11-02 07:29 UTCEchelonGraph re-scored
  12. 2026-11-02 07:29 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  13. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-11-01 08:00 UTCGHSA enrichmentGHSA-628f-v4f6-p37r · GitHub severity CRITICAL · GitHub CVSS 9.3
  15. 2026-11-01 08:00 UTCEchelonGraph re-scored
  16. 2026-11-01 06:53 UTCEchelonGraph re-scored
  17. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-31 06:16 UTCEchelonGraph re-scored
  19. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-10-30 05:40 UTCEchelonGraph re-scored
  21. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-10-29 05:05 UTCEchelonGraph re-scored
  23. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-10-28 04:28 UTCEchelonGraph re-scored
  25. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  26. 2026-10-27 03:50 UTCEchelonGraph re-scored
  27. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  28. 2026-10-25 23:00 UTCEchelonGraph re-scored
  29. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  30. 2026-10-25 14:54 UTCEchelonGraph re-scored
  31. 2026-10-24 22:24 UTCEchelonGraph re-scored
  32. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  33. 2026-10-23 21:48 UTCEchelonGraph re-scored
  34. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  35. 2026-10-22 21:10 UTCEchelonGraph re-scored
  36. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  37. 2026-10-21 20:34 UTCEchelonGraph re-scored
  38. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  39. 2026-10-20 19:56 UTCEchelonGraph re-scored
  40. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  41. 2026-10-19 19:19 UTCEchelonGraph re-scored
  42. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  43. 2026-10-18 18:43 UTCEchelonGraph re-scored
  44. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  45. 2026-10-18 05:07 UTCEchelonGraph re-scored
  46. 2026-10-17 18:06 UTCEchelonGraph re-scored
  47. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  48. 2026-10-16 17:28 UTCEchelonGraph re-scored
  49. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  50. 2026-10-16 08:04 UTCEchelonGraph re-scored
  51. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  52. 2026-10-15 07:06 UTCEchelonGraph re-scored
  53. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  54. 2026-10-14 02:58 UTCEchelonGraph re-scored
  55. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  56. 2026-10-12 16:38 UTCEchelonGraph re-scored
  57. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  58. 2026-10-11 20:14 UTCEchelonGraph re-scored
  59. 2026-10-11 18:26 UTCEchelonGraph re-scored
  60. 2026-10-11 15:00 UTCEchelonGraph re-scored
  61. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  62. 2026-10-11 11:19 UTCEchelonGraph re-scored
  63. 2026-10-10 23:41 UTCEchelonGraph re-scored
  64. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  65. 2026-10-09 20:39 UTCEchelonGraph re-scored
  66. 2026-10-09 19:59 UTCEchelonGraph re-scored
  67. 2026-10-09 19:44 UTCEchelonGraph re-scoredFirst assessed: 9.3 CRITICAL
  68. 2026-10-09 19:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-107845?
CVE-2026-107845 is a critical-severity vulnerability; its CVE record was published on October 9, 2026. Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, an unauthenticated visitor can submit a comment whose email or website metadata is rendered without sufficient attribute and URL encoding by listComments() in comments-bundle/contao/dca/tl_comments.php. When a backend user…
When was the CVE record for CVE-2026-107845 published?
The CVE record for CVE-2026-107845 was published on October 9, 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 October 16, 2026; the record at its source may have been updated since.
Is CVE-2026-107845 actively exploited?
CVE-2026-107845 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107845?
CVE-2026-107845 has a CVSS base score of 9.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107845?
A fix for CVE-2026-107845 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107845 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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