HOMEVULNERABILITIESCVE-2026-41168
MEDIUM

CVE-2026-41168

CWE-834Published: April 22, 2026· Updated: Apr 24, 2026

5.3
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:12.9th

Official Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

NVD Source

Technical Analysis

CVE-2026-41168 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.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Vendors & Products

pypdf_project1 product
pypdf
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3
PATCHhttps://github.com/py-pdf/pypdf/pull/3733
PATCHhttps://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx

All References (4)

→
https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3Patch
→
https://github.com/py-pdf/pypdf/pull/3733Issue Tracking · Patch
→
https://github.com/py-pdf/pypdf/releases/tag/6.10.1Product · Release Notes
→
https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppxMitigation · Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-41168
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-834
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedApr 22, 2026

Related CVEs (CWE-834)

CVE-2026-41313
6.5
CVE-2026-27025
5.5
CVE-2026-48156
3.3

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-41168 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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