Is CVE-2026-27888 actively exploited?

No active exploitation of CVE-2026-27888 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27888 be exploited remotely?

Yes. CVE-2026-27888 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27888?

CVE-2026-27888 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.04%.

HOME VULNERABILITIESCVE-2026-27888

HIGH

CVE-2026-27888

CWE-400Published: February 26, 2026· Updated: Feb 27, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:10.7th

Official Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.

NVD Source

Technical Analysis

CVE-2026-27888 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.