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 long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-5hgr-hg42-57jg | pypdf: Inefficient decoding of FlateDecode PNG predictor streams |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 23 Jun 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 23 Jun 2026 01:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Py-pdf
Py-pdf pypdf |
|
| Vendors & Products |
Py-pdf
Py-pdf pypdf |
Mon, 22 Jun 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2. | |
| Title | pypdf: Inefficient decoding of FlateDecode PNG predictor streams | |
| Weaknesses | CWE-407 | |
| References |
| |
| Metrics |
cvssV4_0
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-23T14:07:48.459Z
Reserved: 2026-05-30T02:43:33.107Z
Link: CVE-2026-49460
Updated: 2026-06-23T14:07:43.881Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-23T00:45:16Z
Weaknesses
Github GHSA