High
pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)
Type: advisorySources: OSV
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-115585
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 06:29 UTC · Revision 1
Source evidence
pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)
core-osv · Original sourcePublished 23 Oct 2026, 19:31 UTC
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.
osv:CVE-2026-115585
Complete source record
{
"id": "40fe1faaf54c3d61a71ea3206be4840b977f4d813264c89b8e45a9b1ab09f083",
"url": "https://osv.dev/vulnerability/CVE-2026-115585",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)",
"summary": "pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.",
"evidence": "osv:CVE-2026-115585",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-115585",
"aliases": [
"CVE-2026-115585",
"GHSA-jr96-gvgh-j3r4"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/py-pdf/pypdf",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "37d05f6916262371f01460d9c1705ab48c9e3a45"
},
{
"fixed": "68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "6.21.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "37d05f6916262371f01460d9c1705ab48c9e3a45"
}
],
"source": "REFERENCES_TAG",
"original_tag": "6.21.2"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115585.json"
}
}
],
"modified": "2026-11-01T02:30:32.599495173Z",
"provider": "osv",
"references": [
"https://github.com/py-pdf/pypdf/releases/tag/6.21.2",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115585.json",
"https://github.com/py-pdf/pypdf/security/advisories/GHSA-jr96-gvgh-j3r4",
"https://nvd.nist.gov/vuln/detail/CVE-2026-115585",
"https://github.com/py-pdf/pypdf/commit/68a0e5046cc9e14a6c24a21a713f3c7fbde18b4b",
"https://github.com/py-pdf/pypdf/pull/4240"
],
"provider_metadata": {
"cwe_ids": [
"CWE-400",
"CWE-407"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115585.json"
}
},
"related_cves": [
{
"value": "CVE-2026-115585",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 493047,
"published_at": "2026-10-23T19:31:52.598+00:00"
}