CVE-2026-47666

HIGHPre-NVD 7.67.6
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (26th 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
Elevated
7.6EG
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: 7.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Penpot is an open-source design and prototyping platform. In versions up to and including 2.14.3, Penpot is vulnerable to stored cross-site scripting through custom font family names, which are interpolated into a @font-face CSS rule and injected into the page as HTML without sanitization. Because the backend accepts an arbitrary font-family string and the frontend writes the resulting style through innerHTML, a name containing markup such as a closing style tag followed by a script can break out of the style element and execute JavaScript on the Penpot origin. The attack is passive: any team member who opens a file referencing the malicious font triggers script execution simply by rendering the page, allowing theft of session cookies, actions performed as the victim, and access to their files and projects. This issue is fixed in version 2.15.3.

CVSS v3
7.6
EG Score
7.6HIGHmedium confidence
EG Risk
50
EG Risk 50/100

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)
Severity76% × 45%
The EG Score, 7.6 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
26th
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 26, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Aug 26, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

CSS injection / XSS via custom font family name — unsanitized into innerHTML · Advisory · penpot/penpot · GitHub

https://github.com/penpot/penpot/security/advisories/GHSA-w5hh-gj5c-5wpc
GitHub commit Patch Available

commit 67d95679711d (penpot/penpot)

Patch available: penpot/penpot 2.15.3 (contains commit 67d95679711d)

https://github.com/penpot/penpot/commit/67d95679711da538b3b22a873bcb6c197104dc0c

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× 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. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  3. 2026-10-12 16:01 UTCEG score recompute
  4. 2026-10-11 19:44 UTCEG score recompute
  5. 2026-10-11 16:59 UTCEG score recompute
  6. 2026-10-11 14:23 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-10-10 06:02 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  11. 2026-10-09 03:19 UTCEG score recompute
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-10-08 01:43 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  15. 2026-10-06 19:16 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  17. 2026-10-05 18:55 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-10-05 07:12 UTCEG score recompute
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-03 19:22 UTCEG score recompute
  22. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-02 18:53 UTCEG score recompute
  24. 2026-10-01 19:55 UTCEG score recompute
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 25th percentile
Show 60 more
  1. 2026-09-30 19:57 UTCEG score recompute
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-09-30 05:59 UTCEG score recompute
  4. 2026-09-29 08:48 UTCEG score recompute
  5. 2026-09-28 21:19 UTCEG score recompute
  6. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  7. 2026-09-27 19:29 UTCEG score recompute
  8. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-09-26 20:30 UTCEG score recompute
  10. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-09-24 18:54 UTCEG score recompute
  13. 2026-09-23 19:55 UTCEG score recompute
  14. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-09-22 19:33 UTCEG score recompute
  16. 2026-09-22 08:04 UTCEG score recompute
  17. 2026-09-20 21:35 UTCEG score recompute
  18. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-09-19 22:36 UTCEG score recompute
  20. 2026-09-18 23:36 UTCEG score recompute
  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-09-18 00:37 UTCEG score recompute
  23. 2026-09-16 14:09 UTCEG score recompute
  24. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  26. 2026-09-15 03:38 UTCEG score recompute
  27. 2026-09-13 17:10 UTCEG score recompute
  28. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  29. 2026-09-12 18:11 UTCEG score recompute
  30. 2026-09-11 19:11 UTCEG score recompute
  31. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  32. 2026-09-10 20:12 UTCEG score recompute
  33. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  34. 2026-09-09 00:47 UTCEG score recompute
  35. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  36. 2026-09-07 18:38 UTCEG score recompute
  37. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  38. 2026-09-06 19:40 UTCEG score recompute
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  40. 2026-09-05 20:39 UTCEG score recompute
  41. 2026-09-04 21:39 UTCEG score recompute
  42. 2026-09-04 10:04 UTCEG score recompute
  43. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  44. 2026-09-02 23:29 UTCEG score recompute
  45. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  46. 2026-09-02 00:27 UTCEG score recompute
  47. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  48. 2026-09-01 12:53 UTCEG score recompute
  49. 2026-08-31 01:56 UTCEG score recompute
  50. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  51. 2026-08-30 02:58 UTCEG score recompute
  52. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  53. 2026-08-29 03:59 UTCEG score recompute
  54. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  55. 2026-08-27 17:30 UTCEG score recompute
  56. 2026-08-27 17:06 UTCEG score recompute
  57. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  58. 2026-08-26 23:21 UTCEG score recompute
  59. 2026-08-26 23:10 UTCEG score recomputeFirst assessed: 7.6 HIGH
  60. 2026-08-26 23:09 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-47666?
CVE-2026-47666 is a high-severity vulnerability; its CVE record was published on August 26, 2026. Penpot is an open-source design and prototyping platform. In versions up to and including 2.14.3, Penpot is vulnerable to stored cross-site scripting through custom font family names, which are interpolated into a @font-face CSS rule and injected into the page as HTML without sanitization. Because…
When was the CVE record for CVE-2026-47666 published?
The CVE record for CVE-2026-47666 was published on August 26, 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 9, 2026; the record at its source may have been updated since.
Is CVE-2026-47666 actively exploited?
CVE-2026-47666 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-47666?
CVE-2026-47666 has a CVSS base score of 7.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-47666?
A fix for CVE-2026-47666 is available: update to the fixed version the vendor names in its advisory.

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