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: 1.3%, top 32% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cisa-adp, epss
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: Track

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
68%
KEV
Not listed

Published

July 25, 2026

Last Modified

July 28, 2026

Advisory Details (4)

Auto-updated Jul 28, 2026
Patch available. Sources: github.
generic

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
generic

Client Challenge

https://metacpan.org/release/RRWO/Catalyst-View-Wkhtmltopdf-v0.6.1/changes
github Patch Available

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
generic

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 14× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-28 16:31 UTCEG score recompute
  2. 2026-07-27 16:17 UTCEG score recompute▲ 9.80
  3. 2026-07-27 16:16 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  4. 2026-07-27 14:13 UTCEPSS rescore
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 02:54 UTCEG score recompute
  8. 2026-07-25 19:21 UTCNVD update
  9. 2026-07-25 18:26 UTCMITRE cvelistV5
  10. 2026-07-25 14:17 UTCEPSS rescore
  11. 2026-07-25 14:17 UTCEPSS rescore
  12. 2026-07-25 10:12 UTCNVD update
  13. 2026-07-25 08:42 UTCEG score recompute
  14. 2026-07-25 08:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16766?
CVE-2026-16766 is a critical vulnerability 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 CVE-2026-16766 disclosed?
CVE-2026-16766 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16766 actively exploited?
CVE-2026-16766 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 32.4% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16766, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-16766

Explore →

Is Your Infrastructure Affected by CVE-2026-16766?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs