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CVE Record

CVE-2026-25535: jsPDF Affected by Client-Side/Server-Side Denial of Service via Malicious GIF Dimensions

jsPDF is a library to generate PDFs in JavaScript. Prior to 4.2.0, user control of the first argument of the `addImage` method results in denial of service. If given the possibility to pass unsanitized image data or URLs to the `addImage` method, a user can provide a harmful GIF file that results in out of memory errors and denial of service. Harmful GIF files have large width and/or height entries in their headers, which lead to excessive memory allocation. Other affected methods are: `html`. The vulnerability has been fixed in jsPDF 4.2.0. As a workaround, sanitize image data or URLs before passing it to the addImage method or one of the other affected methods.

HighCVSS 8.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A malicious GIF can declare enormous dimensions, causing vulnerable jsPDF applications to allocate excessive memory and become unavailable. The issue can affect PDF generation in browsers or servers when users control image data or URLs. It does not indicate data theft or modification.

Executive priority

Treat as urgent where unauthenticated users can submit images or URLs for PDF generation because a single request may exhaust service memory. Upgrade promptly and validate input paths. Where inputs are exclusively trusted, immediate risk is lower, but remediation should remain scheduled.

Technical view

jsPDF versions before 4.2.0 insufficiently handle attacker-controlled GIF dimensions passed through addImage or html. Excessive width or height values trigger uncontrolled memory allocation, potentially causing out-of-memory termination and denial of service. CVSS 4.0 scores it 8.7, with network access, no privileges, and no user interaction required.

Likely exposure

Exposure exists where jsPDF before 4.2.0 processes unsanitized, user-influenced image data or URLs through addImage or html. Internet-facing PDF-generation services are the clearest concern. Applications processing only trusted, fixed images have lower practical exposure, although the vulnerable dependency should still be upgraded.

Exploitation context

The supplied sources describe a remotely triggerable availability flaw, but provide no evidence of active exploitation, and the CVE is not listed as KEV. Exploitation depends on an application exposing a path for untrusted GIF data or URLs to reach affected jsPDF methods.

Researcher notes

The reported weakness is resource exhaustion through excessive allocation, mapped to CWE-400 and CWE-770. Large GIF width or height header values are the trigger condition. The supplied CVSS vector indicates high availability impact without confidentiality or integrity impact. Evidence establishes the affected methods and fixed release, but not exploitation in the wild.

Mitigation direction

  • Upgrade jsPDF to version 4.2.0 or later.
  • Block unsanitized user-controlled image data or URLs from reaching addImage.
  • Apply equivalent image sanitation before content reaches the html method.
  • Prioritize internet-facing PDF-generation services and server-side deployments.

Validation and detection

  • Inventory direct and transitive jsPDF versions in browser bundles and server deployments.
  • Trace addImage and html call paths for user-controlled image data or URLs.
  • Confirm production artifacts resolve jsPDF 4.2.0 or later.
  • Verify sanitation rejects GIFs with unreasonable declared dimensions before jsPDF processing.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-400: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-770: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-25535 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.7 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: yesTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.7CVSS 4.0HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——GitHub_M
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat-SADP

Vulnerability scoring details

Base CVSS 4.0 score

8.7High
CVSS 4.0 vector shape for CVE-2026-25535Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPjsPDF: denial of service via malicious GIF dimensions
other:Red Hat severity ratingcvssV3_1
  • 2026-02-19T15:01:17.455Z: Reported to Red Hat.
  • 2026-02-19T14:34:05.648Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
parallaxjsPDF< 4.2.0Listed
Weakness

CWE details

CWE-400CWE-770

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-400 · source CWE mapping

Uncontrolled Resource Consumption

Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs
CWE-770 · source CWE mapping

Allocation of Resources Without Limits or Throttling

Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs