LOW
CVE-2026-48156
CWE-834Published: May 28, 2026· Updated: May 29, 2026
3.3
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 long runtimes. This requires cross-reference streams with /W [0 0 0] values and large /Size values. This vulnerability is fixed in 6.12.0.
Technical Analysis
CVE-2026-48156 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.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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
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/3791Issue Tracking · Patch
→
https://github.com/py-pdf/pypdf/releases/tag/6.12.0Release Notes
→
https://github.com/py-pdf/pypdf/security/advisories/GHSA-248m-82v9-q6g6Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2026-48156
CVSS Score3.3 / 10
SeverityLOW
WeaknessCWE-834
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 28, 2026
Related CVEs (CWE-834)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-48156 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.