CVE-2026-59941

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% 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: epss, secondary
Trending — 3 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.3Exploit: Elevated riskExposed: 0

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

Dompdf is an HTML to PDF converter for PHP. Versions 3.15 and prior accept a BMP image and generates a PDF-compatible PNG based only on its declared header dimensions and never bounds width × height before the image is converted through GD. A 58-byte BMP whose header declares e.g. 6000×6000 is accepted and later drives imagecreatetruecolor($width, $height) (and PHP's native BMP decoder) to allocate the full pixel canvas. A payload can fit in a single HTTP request: the BMP can be inlined as a data:image/bmp;base64,… URI inside attacker-controlled HTML, so no upload, no remote fetch, and no chroot-reachable file is required. I measured a 169-byte request driving a dompdf render to ~412 MB peak RSS and ~4.8 s of CPU/wall time, versus ~34 MB for an identically-sized benign request — roughly a 12× memory amplification per request, repeatable and unauthenticated. This issue has been fixed in version 3.16.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
40%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 30, 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 7c65e7bbeccf (dompdf/dompdf)

Patch available: dompdf/dompdf v3.1.6 (contains commit 7c65e7bbeccf)

https://github.com/dompdf/dompdf/commit/7c65e7bbeccf146b2409740405af73949ad129d0
github Patch Available🟡 PoC Available

Uncontrolled resource consumption based on declared BMP dimensions · Advisory · dompdf/dompdf · GitHub

https://github.com/dompdf/dompdf/security/advisories/GHSA-8hg6-c449-896m

Vendor Advisories for CVE-2026-59941(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
dompdf/dompdfv0.6.0 ... v3.1.5 (39 versions)3.1.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 11× 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. 2026-07-30 16:46 UTCEG score recompute
  2. 2026-07-30 16:28 UTCEPSS rescore
  3. 2026-07-30 13:00 UTCEG score recompute
  4. 2026-07-30 01:30 UTCEPSS rescore
  5. 2026-07-30 01:30 UTCEPSS rescore
  6. 2026-07-29 13:19 UTCEG score recompute
  7. 2026-07-28 21:26 UTCEG score recompute
  8. 2026-07-28 21:02 UTCEG score recompute▲ 6.30
  9. 2026-07-28 21:02 UTCMITRE cvelistV5CVSS v3 → 6.3 · CVSS v4 → 6.3
  10. 2026-07-23 03:21 UTCEG score recompute
  11. 2026-07-22 23:22 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59941?
CVE-2026-59941 is a medium vulnerability published on July 22, 2026. Dompdf is an HTML to PDF converter for PHP. Versions 3.15 and prior accept a BMP image and generates a PDF-compatible PNG based only on its declared header dimensions and never bounds width × height before the image is converted through GD. A 58-byte BMP whose header declares e.g. 6000×6000 is…
When was CVE-2026-59941 disclosed?
CVE-2026-59941 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59941 actively exploited?
CVE-2026-59941 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 59.5% of all scored CVEs.
What is the CVSS score of CVE-2026-59941?
CVE-2026-59941 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-59941?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59941, 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

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