CVE-2026-16766

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 2.6% (84th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from CISA-ADP (Vulnrichment) CVSS v3.1
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS
9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

Upgrade to Catalyst::View::Wkhtmltopdf version 0.6.1 or later (from the CVE record's solution, CPAN Security Group) — apply it.

Catalyst::View::Wkhtmltopdf versions before 0.6.1 for Perl allow shell command injection (RCE) via PDF render options.

Options are passed directly to the wkhtmltopdf command without sanitization.

Any web application that passes user-controlled options such as the page_size, orientation or margins without validation allows shell command injection.

Version 0.6.0 was released with an incomplete fix for this issue.

Note that the wkhtmltopdf project is no longer being developed, and users of this package should migrate to alternative solutions.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

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)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation2.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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: Upgrade to Catalyst::View::Wkhtmltopdf version 0.6.1 or later (from the CVE record's solution, CPAN Security Group). Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.6%
EPSS %ILE
84th
KEV
Not listed

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

Upgrade to Catalyst::View::Wkhtmltopdf version 0.6.1 or later (from the CVE record's solution, CPAN Security Group). Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

July 25, 2026

Last Modified

August 13, 2026

Advisory Details (5)

Auto-updated Oct 8, 2026
Fix named in the CVE record's solution (CPAN Security Group). Sources: github.
Web page

oss-security - CVE-2026-16766: Catalyst::View::Wkhtmltopdf versions before 0.6.1 for Perl allow shell command injection (RCE) via PDF render options

http://www.openwall.com/lists/oss-security/2026/07/25/4
GitHub advisoryMentions a patch (unverified)

shell command injection (RCE) via PDF render options · Advisory · robrwo/Catalyst-View-Wkhtmltopdf · GitHub

https://github.com/robrwo/Catalyst-View-Wkhtmltopdf/security/advisories/GHSA-42w4-jj8w-6p98
Web page

Git Repository has moved and bug reports should be filed on RT · Issue #6 · mc7244/Catalyst-View-Wkhtmltopdf · GitHub

https://github.com/mc7244/Catalyst-View-Wkhtmltopdf/issues/6

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× 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 133 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 33 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 20:09 UTCEG score recompute
  2. 2026-10-11 17:21 UTCEG score recompute
  3. 2026-10-11 14:54 UTCEG score recompute
  4. 2026-10-11 13:48 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  5. 2026-10-10 19:59 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  6. 2026-10-09 20:06 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  7. 2026-10-08 17:11 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  8. 2026-10-07 23:47 UTCEPSS rescoreEPSS 2.6% · 84th percentile
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  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 2.6% · 84th percentile
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  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 2.6% · 84th percentile
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  14. 2026-10-01 19:49 UTCEPSS rescoreEPSS 2.6% · 84th percentile
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  16. 2026-09-30 15:02 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  17. 2026-09-29 15:20 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  19. 2026-09-28 04:25 UTCEG score recompute
  20. 2026-09-27 13:47 UTCEPSS rescoreEPSS 2.6% · 84th percentile
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  22. 2026-09-25 09:59 UTCEG score recompute
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  25. 2026-09-20 01:38 UTCEG score recompute
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  1. 2026-09-18 22:27 UTCEG score recompute
  2. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  3. 2026-09-18 02:55 UTCEG score recompute
  4. 2026-09-17 01:57 UTCEG score recompute
  5. 2026-09-16 14:07 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  6. 2026-09-16 06:38 UTCEG score recompute
  7. 2026-09-16 05:14 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  8. 2026-09-15 09:33 UTCEG score recompute
  9. 2026-09-13 17:47 UTCEG score recompute
  10. 2026-09-13 16:46 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  11. 2026-09-12 18:59 UTCEG score recompute
  12. 2026-09-12 15:00 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  13. 2026-09-11 16:34 UTCEG score recompute
  14. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  15. 2026-09-11 09:36 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  16. 2026-09-10 13:33 UTCEG score recompute
  17. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  18. 2026-09-09 08:42 UTCEG score recompute
  19. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.4% · 71st percentile
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  21. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  22. 2026-09-06 17:25 UTCEG score recompute
  23. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  24. 2026-09-05 19:22 UTCEG score recompute
  25. 2026-09-04 17:10 UTCEG score recompute
  26. 2026-09-04 12:43 UTCEG score recompute
  27. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  28. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  29. 2026-09-01 23:15 UTCEG score recompute
  30. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  31. 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  32. 2026-08-30 23:29 UTCEG score recompute
  33. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  34. 2026-08-30 04:38 UTCEG score recompute
  35. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  36. 2026-08-30 00:14 UTCEG score recompute
  37. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  38. 2026-08-27 14:25 UTCEG score recompute
  39. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  40. 2026-08-26 15:10 UTCEG score recompute
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  43. 2026-08-25 13:48 UTCEPSS rescoreEPSS 1.4% · 70th percentile
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  47. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  48. 2026-08-22 01:50 UTCEG score recompute
  49. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  50. 2026-08-20 23:17 UTCEG score recompute
  51. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.3% · 68th percentile
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  53. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.3% · 68th percentile
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  55. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  56. 2026-08-17 14:37 UTCEG score recompute
  57. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  58. 2026-08-16 16:30 UTCEG score recompute
  59. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  60. 2026-08-16 03:18 UTCEG score recompute
  61. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.3% · 68th percentile
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  63. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  64. 2026-08-13 22:28 UTCEG score recompute
  65. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  66. 2026-08-12 14:31 UTCEG score recompute
  67. 2026-08-12 13:50 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  68. 2026-08-11 16:29 UTCEG score recompute
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  71. 2026-08-11 00:00 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  72. 2026-08-09 16:03 UTCEG score recompute
  73. 2026-08-09 13:46 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  74. 2026-08-08 18:02 UTCEG score recompute
  75. 2026-08-08 16:37 UTCEPSS rescoreEPSS 1.3% · 67th percentile

Frequently asked(5)

What is CVE-2026-16766?
CVE-2026-16766 is a critical-severity vulnerability; its CVE record was published on July 25, 2026. Catalyst::View::Wkhtmltopdf versions before 0.6.1 for Perl allow shell command injection (RCE) via PDF render options. Options are passed directly to the wkhtmltopdf command without sanitization. Any web application that passes user-controlled options such as the page_size, orientation or margins…
When was the CVE record for CVE-2026-16766 published?
The CVE record for CVE-2026-16766 was published on July 25, 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 August 13, 2026; the record at its source may have been updated since.
Is CVE-2026-16766 actively exploited?
CVE-2026-16766 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% probability of exploitation in the next 30 days (84th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16766?
CVE-2026-16766 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16766?
The CVE record's solution for CVE-2026-16766, written by its CNA CPAN Security Group, names the fix: "Upgrade to Catalyst::View::Wkhtmltopdf version 0.6.1 or later."

Dependency Blast Radius

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