SecuriTricks - CVE-2026-27025

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. This vulnerability is fixed in 6.7.1.

Product(s) Impacted

Vendor	Product	Versions
Pypdf	Pypdf	<6.7.1, 6.7.1

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-834

Excessive Iteration

The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	pypdf	pypdf	<6.7.1	/	/	/	/	/	/	/
a	pypdf	pypdf	6.7.1	/	/	/	/	/	/	/

References

https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a2

https://github.com/py-pdf/pypdf/pull/3646

https://github.com/py-pdf/pypdf/releases/tag/6.7.1

https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq3

CVSS Score

6.9 / 10

CVSS Data - 4.0

Attack Vector: LOCAL
Attack Complexity: LOW
Attack Requirements: NONE
Privileges Required: NONE
User Interaction: NONE
Scope:
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: HIGH
Exploit Maturity: NOT_DEFINED

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

View Vector String

Timeline

Published: Feb. 20, 2026, 10:16 p.m.
Last Modified: Feb. 20, 2026, 10:16 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-27025