Medium severity · published Jun 22, 2026
CVE-2026-49461
pypdf: Possible large memory usage for form XObjects during text extraction
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references. This vulnerability is fixed in 6.12.2.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
pypdf · py-pdf
< 6.12.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49461
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49461
Issue Tracking
https://github.com/py-pdf/pypdf/pull/3805
Patch
https://github.com/py-pdf/pypdf/releases/tag/6.12.2
Patch
https://github.com/py-pdf/pypdf/security/advisories/GHSA-j543-4vmf-qm7v
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