CVE-2026-59943

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.4% (34th percentile of EPSS-scored CVEs). 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: epss, nvd
Elevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Dompdf is an HTML to PDF converter for PHP. In versions 3.15 and prior, if a malicious actor can supply unrestricted content for rendering by Dompdf they can utilize the SVG rendering functionality to leak filesystem information when rendering PDF files using image references within a data-URI encoded SVG document. Using an element inside a data-URI embedded SVG, an attacker can attempt to embed other files via the href or xlink:href attributes. When processing a file that does not exist (e.g. file:///DOESNOTEXIST), dompdf behaves differently than it does when accessing a file or directory that actually exists on the filesystem. This issue has been fixed in version 3.16.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 22, 2026

Last Modified

August 4, 2026

Advisory Details (3)

Auto-updated Jul 28, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

Dompdf 3.1.6

Patch available: dompdf/dompdf v3.1.6

https://github.com/dompdf/dompdf/releases/tag/v3.1.6
github_commit Patch Available

commit 6a58996865db (dompdf/dompdf)

Patch available: dompdf/dompdf v3.1.6 (contains commit 6a58996865db)

https://github.com/dompdf/dompdf/commit/6a58996865db05d8fede748507e50ac4b8c5bfd0
githubMentions a patch (unverified)🟡 PoC Available

Embedded SVG images can leak existence of files and directories within the filesystem · Advisory · dompdf/dompdf · GitHub

https://github.com/dompdf/dompdf/security/advisories/GHSA-j8qw-6jw8-r297

Vendor Advisories for CVE-2026-59943(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
php-dompdf0.6.2+dfsg-3.1 ... 3.1.4+dfsg-2 (19 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
php-dompdf2.0.3+dfsg-1 ... 3.1.4+dfsg-2 (15 versions)
  • every version on: no fix on record
—
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
dompdf/dompdfv0.6.0 ... v3.1.5 (39 versions)
  • every version up to 3.1.6: fixed in 3.1.6
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 38× 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.

Showing the most recent 100 of 114 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:13 UTCEPSS rescore
  4. 2026-10-07 23:48 UTCEPSS rescore
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  8. 2026-10-04 12:45 UTCEG score recompute
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  11. 2026-10-02 17:56 UTCEPSS rescore
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  14. 2026-09-30 15:03 UTCEPSS rescore
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  17. 2026-09-28 05:14 UTCEG score recompute
  18. 2026-09-27 13:48 UTCEPSS rescore
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  21. 2026-09-24 01:30 UTCEG score recompute
  22. 2026-09-23 17:54 UTCEPSS rescore
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  24. 2026-09-20 20:16 UTCEPSS rescore
  25. 2026-09-20 01:59 UTCEG score recompute
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  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 10:26 UTCEG score recompute
  3. 2026-09-17 19:31 UTCEPSS rescore
  4. 2026-09-17 09:37 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 06:56 UTCEG score recompute
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  19. 2026-09-06 13:47 UTCEPSS rescore
  20. 2026-09-05 19:33 UTCEG score recompute
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  22. 2026-09-04 05:07 UTCEPSS rescore
  23. 2026-09-02 14:12 UTCEPSS rescore
  24. 2026-09-01 23:36 UTCEG score recompute
  25. 2026-09-01 13:54 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-08-31 01:38 UTCEG score recompute
  28. 2026-08-30 19:17 UTCEPSS rescore
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  30. 2026-08-30 00:50 UTCEG score recompute
  31. 2026-08-28 21:42 UTCEPSS rescore
  32. 2026-08-27 14:25 UTCEPSS rescore
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  34. 2026-08-26 14:46 UTCEPSS rescore
  35. 2026-08-26 10:42 UTCEG score recompute
  36. 2026-08-25 13:49 UTCEPSS rescore
  37. 2026-08-25 08:33 UTCEG score recompute
  38. 2026-08-23 06:49 UTCEG score recompute
  39. 2026-08-23 00:19 UTCEPSS rescore
  40. 2026-08-22 06:01 UTCEG score recompute
  41. 2026-08-21 23:49 UTCEPSS rescore
  42. 2026-08-21 05:13 UTCEG score recompute
  43. 2026-08-20 22:55 UTCEPSS rescore
  44. 2026-08-20 04:25 UTCEG score recompute
  45. 2026-08-19 17:04 UTCEPSS rescore
  46. 2026-08-19 03:37 UTCEG score recompute
  47. 2026-08-18 13:48 UTCEPSS rescore
  48. 2026-08-18 01:55 UTCEG score recompute
  49. 2026-08-17 13:47 UTCEPSS rescore
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  51. 2026-08-16 14:56 UTCEPSS rescore
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  55. 2026-08-13 22:44 UTCEG score recompute
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  62. 2026-08-09 13:46 UTCEPSS rescore
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  65. 2026-08-07 17:55 UTCEG score recompute
  66. 2026-08-06 17:07 UTCEG score recompute
  67. 2026-08-06 13:47 UTCEPSS rescore
  68. 2026-08-05 19:17 UTCEPSS rescore
  69. 2026-08-04 15:31 UTCEG score recompute▼ 1.00
  70. 2026-08-04 15:31 UTCNVD updateCVSS v3 → 5.3
  71. 2026-08-04 15:10 UTCEPSS rescore
  72. 2026-08-04 10:39 UTCEPSS rescore
  73. 2026-08-03 20:01 UTCEG score recompute
  74. 2026-08-03 10:36 UTCEPSS rescore
  75. 2026-08-02 19:13 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-59943?
CVE-2026-59943 is a medium vulnerability published on July 22, 2026. Dompdf is an HTML to PDF converter for PHP. In versions 3.15 and prior, if a malicious actor can supply unrestricted content for rendering by Dompdf they can utilize the SVG rendering functionality to leak filesystem information when rendering PDF files using image references within a data-URI…
When was CVE-2026-59943 disclosed?
CVE-2026-59943 was first published on July 22, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59943 actively exploited?
CVE-2026-59943 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59943?
CVE-2026-59943 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-59943?
A fix for CVE-2026-59943 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59943 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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