pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive time and memory when an application accesses the page count of a crafted encrypted PDF whose page tree declares a forged /Count value. Even after successful decryption, page-count retrieval trusts the unvalidated declared count instead of walking the page tree, allowing the attacker-controlled value to drive excessive work and memory use. This issue is fixed in version 6.21.3.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-400"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119208.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:py-pdf:pypdf:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "6.21.3"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "82b91951dc74496bb3efe6465434f041bb6a5e6b"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "6.21.3",
"range": [
{
"fixed": "a9f9c4f16f1fb6b48be089ef6eae250dbaef5d23"
}
],
"source": "REFERENCES_TAG"
}
]
}