Dompdf is an HTML to PDF converter for PHP. Versions 3.15 and prior are vulnerable to a Denial of Service (DoS) attack via resource exhaustion. An attacker can crash the PHP process by providing a specially crafted HTML document containing a single image with massive dimensions (e.g., 30,000x30,000 pixels). While Dompdf implements internal checks to validate image dimensions, these can be bypassed by using a high-entropy image (such as random noise) encoded in Base64 and wrapped in specific CSS containers. The vulnerability exists because the dimension validation happens early, but the resource allocation for calculating the object's bounding box and internal buffers during the rendering phase does not strictly limit the cumulative CPU time or memory usage for a single object that has passed the initial check. An unauthenticated remote attacker can cause a complete Denial of Service on the web server by submitting a crafted HTML string. This affects any application that allows users to provide HTML content or URLs that are subsequently converted to PDF using Dompdf. This issue has been fixed in version 3.16.
CVE-2026-59942
“—” beside the score: it is equal to NVD's CVSS score.
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.9% (59th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-50060 (ENISA EUVD) · GHSA-f5gf-2cj8-52g2 (GitHub Security Advisories)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 65EG Risk 65/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.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 public PoC (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.9%
- EPSS %ILE
- 59th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 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 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
July 22, 2026
Last Modified
August 4, 2026
Advisory Details (4)
Auto-updated Jul 28, 2026Dompdf 3.1.6
Patch available: dompdf/dompdf v3.1.6
https://github.com/dompdf/dompdf/releases/tag/v3.1.6commit 89164eaabe0b (dompdf/dompdf)
Patch available: dompdf/dompdf v3.1.6 (contains commit 89164eaabe0b)
https://github.com/dompdf/dompdf/commit/89164eaabe0bb50c462f0b24f740044ba5fb0f99commit 7c65e7bbeccf (dompdf/dompdf)
Patch available: dompdf/dompdf v3.1.6 (contains commit 7c65e7bbeccf)
https://github.com/dompdf/dompdf/commit/7c65e7bbeccf146b2409740405af73949ad129d0Denial of Service (DoS) via Resource Exhaustion using Oversized Image Bitmaps · Advisory · dompdf/dompdf · GitHub
https://github.com/dompdf/dompdf/security/advisories/GHSA-f5gf-2cj8-52g2Vendor Advisories for CVE-2026-59942(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)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| php-dompdf | 0.6.2+dfsg-3.1 ... 3.1.4+dfsg-2 (19 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| php-dompdf | 2.0.3+dfsg-1 ... 3.1.4+dfsg-2 (15 versions) |
| — |
Packagist(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| dompdf/dompdf | v0.6.0 ... v3.1.5 (39 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 41× 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 154 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 54 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-27 23:45 UTCEG score recompute
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-25 14:16 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-20 18:57 UTCEG score recompute
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-18 03:27 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-13 15:46 UTCEG score recompute
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-12 15:52 UTCEG score recompute
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- 2026-10-11 19:36 UTCEG score recompute
- 2026-10-11 16:51 UTCEG score recompute
- 2026-10-11 14:13 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-04 12:45 UTCEG score recompute
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-03 03:31 UTCEG score recompute
- 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-01 06:26 UTCEG score recompute
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-28 05:14 UTCEG score recompute
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-24 01:30 UTCEG score recompute
- 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
- 2026-09-22 23:00 UTCEG score recompute
- 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
- 2026-09-20 01:59 UTCEG score recompute
- 2026-09-18 22:40 UTCEG score recompute
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
- 2026-09-18 03:09 UTCEG score recompute
- 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
- 2026-09-17 02:05 UTCEG score recompute
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
- 2026-09-16 06:56 UTCEG score recompute
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-14 02:13 UTCEG score recompute
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-13 01:21 UTCEG score recompute
- 2026-09-11 22:09 UTCEG score recompute
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-11 09:42 UTCEG score recompute
- 2026-09-10 21:14 UTCEG score recompute
- 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-09 09:10 UTCEG score recompute
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-07 21:39 UTCEG score recompute
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-05 19:33 UTCEG score recompute
- 2026-09-05 07:06 UTCEG score recompute
- 2026-09-04 13:39 UTCEG score recompute
- 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-01 23:36 UTCEG score recompute
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-08-31 01:43 UTCEG score recompute
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-08-30 13:16 UTCEG score recompute
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-08-30 00:50 UTCEG score recompute
- 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-08-27 15:20 UTCEG score recompute
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-08-27 02:53 UTCEG score recompute
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-08-26 01:59 UTCEG score recompute
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-08-25 01:06 UTCEG score recompute
- 2026-08-24 12:40 UTCEG score recompute
- 2026-08-23 11:47 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Related CVEs(same product + same CWE)
Same product
10 shownDebian:11:php-dompdf
Frequently asked(5)
What is CVE-2026-59942?
When was the CVE record for CVE-2026-59942 published?
Is CVE-2026-59942 actively exploited?
What is the CVSS score of CVE-2026-59942?
How do I remediate CVE-2026-59942?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-59942
Is Your Infrastructure Affected by CVE-2026-59942?
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