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Response snapshot Oct 27, 2026, 16:01 UTC

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VulnerabilityCVE-2026-114609

fpdf2 implicitly loads external URLs and local image paths when rendering attacker-controlled content

`fpdf2` implicitly dereferences image resource references supplied to rendering APIs. If an application passes untrusted HTML, SVG, template data, or image paths into those APIs, `fpdf2` may issue outbound HTTP(S) requests or attempt to open local filesystem paths.

Published Updated

At a glance

Exploited
Not known
Severity
5.8 Medium (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
1 source

What to do

GitHub lists first patched versions: fpdf2: 2.8.8. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-rw7v-4hrq-x6r9 (opens a new tab)

What happened

## Summary

`fpdf2` implicitly dereferences image resource references supplied to rendering APIs. If an application passes untrusted HTML, SVG, template data, or image paths into those APIs, `fpdf2` may issue outbound HTTP(S) requests or attempt to open local filesystem paths.

This behavior is relevant in applications that render untrusted or user-provided input without sanitizing or restricting embedded resource references.

## Description

Continue reading

In affected versions, `fpdf2` uses a shared internal image-loading mechanism for multiple features. This loader:

* fetches `http://` and `https://` URLs over the network * opens other string values as local filesystem paths

During document processing, resource references embedded in input content are automatically dereferenced using this mechanism.

This behavior is reachable through:

* `FPDF.image()` * `FPDF.write_html()` via HTML ` ` * `FPDF.image()` when rendering SVG files containing ` ` or `xlink:href="...">` * template image elements that forward values into `FPDF.image()`

If an application renders attacker-controlled input through these APIs, that input can cause:

* outbound HTTP(S) requests to attacker-chosen destinations * local file open attempts for attacker-chosen paths

This may enable Server-Side Request Forgery (SSRF) in applications that render untrusted content.

Local file access impact is limited: the library attempts to open the referenced path, but successful embedding depends on the target being a valid and supported image or SVG resource.

`file://` URLs are not specially handled; raw filesystem paths such as `/path/to/file` or `../../file.png` are the relevant local-path cases.

## Impact

This issue affects applications that render untrusted or partially trusted content using `fpdf2`.

Applications may be impacted if they:

* pass untrusted HTML into `write_html()` * render untrusted SVG with embedded ` ` references * pass user-controlled strings into `image()` * allow untrusted template definitions or template field values to control image paths

Potential impacts include:

* outbound requests to internal or external network services * limited local file access attempts depending on file type and parsing success (limited to content that fpdf2 recognizes as a supported image or SVG resource)

The severity depends on how `fpdf2` is integrated and whether untrusted input is allowed to control resource references.

**Example scenarios**

HTML: ```python pdf.write_html(' ') ```

SVG: ```xml

```

Direct image path: ```python pdf.image("../../.env") ```

**Workarounds**

Applications can mitigate this by:

- not rendering untrusted HTML, SVG, or template content - rejecting user-controlled `src` / `href` / image-path values - mapping resources through an application-defined allowlist - converting user-supplied images to trusted in-memory objects before passing them to `fpdf2`

**Credits**

- @kule500 for identifying SSRF via HTML handling - @BudongJW for identifying SVG resource loading as an additional vector - @redyank for analysis of the shared image loading mechanism - @manop55555 for identifying a DNS rebinding bypass in the initial REMOTE_PUBLIC implementation

Affected package ranges reported by GitHub: fpdf2: <= 2.8.7

Scores and how they were measured

CVSS base severity

5.8

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-rw7v-4hrq-x6r9 (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-rw7v-4hrq-x6r9, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 27). fpdf2 implicitly loads external URLs and local image paths when rendering attacker-controlled content (CVE-2026-114609). https://kevwire.com/record/CVE-2026-114609

MLA

"fpdf2 implicitly loads external URLs and local image paths when rendering attacker-controlled content (CVE-2026-114609)." KEVWire, 27 Oct. 2026, kevwire.com/record/CVE-2026-114609.

Chicago

KEVWire. "fpdf2 implicitly loads external URLs and local image paths when rendering attacker-controlled content (CVE-2026-114609)." Last modified October 27, 2026. https://kevwire.com/record/CVE-2026-114609.

Evidence summary (plain text)

fpdf2 implicitly loads external URLs and local image paths when rendering attacker-controlled content (Oct 27, 2026).
`fpdf2` implicitly dereferences image resource references supplied to rendering APIs. If an application passes untrusted HTML, SVG, template data, or image paths into those APIs, `fpdf2` may issue outbound HTTP(S) requests or attempt to open local filesystem paths.

This behavior is relevant in applications that render untrusted or user-provided input without sanitizing or restricting embedded resource references.
CVSS 5.8 (version 3.1; evidence as of Oct 27, 2026; https://github.com/advisories/GHSA-rw7v-4hrq-x6r9).
Sources:
GitHub-reviewed advisory GHSA-rw7v-4hrq-x6r9: https://github.com/advisories/GHSA-rw7v-4hrq-x6r9
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
Record ID: CVE-2026-114609.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 16:00 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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