MEDIUM
CVE-2026-28804
CWE-407Published: March 6, 2026· Updated: Mar 10, 2026
5.3
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:12.7th
Official Description
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.
Technical Analysis
CVE-2026-28804 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
All References (4)
→
https://github.com/py-pdf/pypdf/pull/3666Issue Tracking · Patch
→
https://github.com/py-pdf/pypdf/releases/tag/6.7.5Product · Release Notes
→
https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2026-28804
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-407
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMar 6, 2026
Related CVEs (CWE-407)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-28804 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.