Resource Exhaustion Affecting pypdf2 package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.55% (45th percentile)

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  • Snyk IDSNYK-ECHOLATEST-PYPDF2-18592195
  • published8 Aug 2026
  • disclosed27 Feb 2026

Introduced: 27 Feb 2026

CVE-2026-28351  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest pypdf2.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pypdf2 package and not the pypdf2 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.

CVSS Base Scores

version 3.1