CVE-2026-3778 [Medium] | Security Vulnerability in Pdf Editor

The application does not detect or guard against cyclic PDF object references while handling JavaScript in PDF. When pages and annotations are crafted that reference each other in a loop, passing the document to APIs (e.g., SOAP) that perform deep traversal can cause uncontrolled recursion, stack exhaustion, and application crashes.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-01	—	0.01%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-01

—

0.01%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.2	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.5	3.6	14984358-7092-470d-8f34-ade47a7658a2
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.2

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.5

3.6

14984358-7092-470d-8f34-ade47a7658a2

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

Affected software / configurations for CVE-2026-3778

Vendor	Product	Version	Raw CPE
foxit	pdf_editor	<= 13.2.2.24014	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 14.0.0.33046, <= 14.0.2.33402	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 2023.1.0.15510, <= 2023.3.0.23028	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 2024.1.0.23997, <= 2024.4.1.27687	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 2025.1.0.27937, <= 2025.3.0.35737	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_reader	<= 2025.3.0.35737	cpe:2.3:a:foxit:pdf_reader::::::::
foxit	pdf_editor	<= 13.2.2.63349	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 14.0.0.68868, <= 14.0.2.69164	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 2023.1.0.55583, <= 2023.3.0.63083	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 2024.1.0.63682, <= 2024.4.1.66479	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_editor	>= 2025.1.0.66692, <= 2025.3.0.69570	cpe:2.3:a:foxit:pdf_editor::::::::
foxit	pdf_reader	<= 2025.3.0.69570	cpe:2.3:a:foxit:pdf_reader::::::::

References for CVE-2026-3778

URL	Tags
https://www.foxit.com/support/security-bulletins.html	Vendor Advisory

URL

CVE-2026-3778 | Stack exhaustion caused by cyclic references in Foxit PDF Editor/Reader

Exploit prediction scoring system (EPSS) score for CVE-2026-3778

Common vulnerability scoring system (CVSS) metrics for CVE-2026-3778

Weakness enumeration for CVE-2026-3778

Affected software / configurations for CVE-2026-3778

References for CVE-2026-3778