MEDIUM
CVE-2026-48155
CWE-400Published: May 28, 2026· Updated: May 29, 2026
5.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.2th
Official Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets. This vulnerability is fixed in 6.12.0.
Technical Analysis
CVE-2026-48155 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (3)
→
https://github.com/py-pdf/pypdf/pull/3790Issue Tracking · Patch
→
https://github.com/py-pdf/pypdf/releases/tag/6.12.0Release Notes
→
https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2026-48155
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-400
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 28, 2026
Related CVEs (CWE-400)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-48155 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.