CVE-2026-66353

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
5.3EG
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: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in woylie doggo allows Reflected XSS.

Doggo.normalize_value/2 in lib/doggo.ex returned date field values wrapped in {:safe, ...}, the Phoenix.HTML marker meaning "already escaped, emit verbatim", without escaping them, so the value reached the value attribute of the rendered by the field component unchanged. Any application rendering <.field type="date"> over user-controlled params is affected through the ordinary Phoenix form round-trip, where a failed validation re-renders the submitted value. The pattern kept exactly the first ten bytes and discarded shorter values, capping a payload at ten bytes: enough to terminate the attribute and open an element or attach a short event handler, not enough to place attacker-chosen script inline. Only type="date" is affected.

This issue affects doggo: from 0.1.0 before 0.14.8.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.5% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

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

August 27, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 27, 2026
Patch available. Sources: github_commit, github.
Web page

OSV - Open Source Vulnerabilities

https://osv.dev/vulnerability/EEF-CVE-2026-66353
GitHub advisoryMentions a patch (unverified)

Doggo vulnerable to cross-site scripting via unescaped date field values · Advisory · woylie/doggo · GitHub

https://github.com/woylie/doggo/security/advisories/GHSA-w9rp-cf93-86pj
GitHub commit Patch Available

commit 0161c976a114 (woylie/doggo)

Patch available: woylie/doggo 0.14.8 (contains commit 0161c976a114)

https://github.com/woylie/doggo/commit/0161c976a114a4a4faee22d599b3fd5f147fc443

Affected Packages

(1 across 1 ecosystem)
Hex(1)
PackageVulnerable rangeFix by version rangeDependents
doggo0.1.0 ... 0.9.1 (42 versions)
  • 0.1.0 up to 0.14.8: fixed in 0.14.8
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 51× 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.

  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-10-12 15:46 UTCEG score recompute
  5. 2026-10-11 19:31 UTCEG score recompute
  6. 2026-10-11 16:46 UTCEG score recompute
  7. 2026-10-11 14:07 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-10 05:48 UTCEG score recompute
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-09 07:26 UTCEG score recompute
  13. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-10-08 09:04 UTCEG score recompute
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-10-07 10:42 UTCEG score recompute
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-06 12:16 UTCEG score recompute
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-10-05 13:55 UTCEG score recompute
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-03 16:43 UTCEG score recompute
  23. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-10-02 18:21 UTCEG score recompute
  25. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
Show 58 more
  1. 2026-10-01 19:53 UTCEG score recompute
  2. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-09-30 19:54 UTCEG score recompute
  4. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-09-29 14:15 UTCEG score recompute
  6. 2026-09-28 15:24 UTCEG score recompute
  7. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-09-27 17:03 UTCEG score recompute
  9. 2026-09-26 18:42 UTCEG score recompute
  10. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-09-24 23:29 UTCEG score recompute
  12. 2026-09-24 00:32 UTCEG score recompute
  13. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-09-23 02:11 UTCEG score recompute
  15. 2026-09-22 03:49 UTCEG score recompute
  16. 2026-09-21 05:27 UTCEG score recompute
  17. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-09-20 06:03 UTCEG score recompute
  19. 2026-09-19 07:42 UTCEG score recompute
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-09-18 09:20 UTCEG score recompute
  22. 2026-09-17 10:57 UTCEG score recompute
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-09-16 12:35 UTCEG score recompute
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  26. 2026-09-15 14:14 UTCEG score recompute
  27. 2026-09-13 17:31 UTCEG score recompute
  28. 2026-09-12 19:09 UTCEG score recompute
  29. 2026-09-11 20:48 UTCEG score recompute
  30. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  31. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  32. 2026-09-10 22:21 UTCEG score recompute
  33. 2026-09-09 00:40 UTCEG score recompute
  34. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  35. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  36. 2026-09-06 14:04 UTCEG score recompute
  37. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  38. 2026-09-05 15:43 UTCEG score recompute
  39. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  40. 2026-09-04 17:21 UTCEG score recompute
  41. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  42. 2026-09-02 20:29 UTCEG score recompute
  43. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  44. 2026-09-01 21:23 UTCEG score recompute
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  46. 2026-09-01 10:08 UTCEG score recompute
  47. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  48. 2026-08-31 11:46 UTCEG score recompute
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  50. 2026-08-30 13:24 UTCEG score recompute
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  52. 2026-08-29 15:03 UTCEG score recompute
  53. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  54. 2026-08-28 16:41 UTCEG score recompute
  55. 2026-08-28 15:43 UTCEG score recompute
  56. 2026-08-27 20:27 UTCEG score recompute
  57. 2026-08-27 20:16 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  58. 2026-08-27 20:13 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-66353?
CVE-2026-66353 is a medium-severity vulnerability; its CVE record was published on August 27, 2026. Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in woylie doggo allows Reflected XSS. Doggo.normalize_value/2 in lib/doggo.ex returned date field values wrapped in {:safe, ...}, the Phoenix.HTML marker meaning "already escaped, emit verbatim",…
When was the CVE record for CVE-2026-66353 published?
The CVE record for CVE-2026-66353 was published on August 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 September 1, 2026; the record at its source may have been updated since.
Is CVE-2026-66353 actively exploited?
CVE-2026-66353 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-66353?
CVE-2026-66353 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-66353?
A fix for CVE-2026-66353 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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