Moderate severityGHSA Advisory· Published Jun 16, 2026
pypdf: Inefficient decoding of FlateDecode PNG predictor streams
CVE-2026-49460
Description
Impact
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.
Patches
This has been fixed in pypdf==6.12.2.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3806.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pypdfPyPI | < 6.12.2 | 6.12.2 |
Affected products
2Patches
Vulnerability mechanics
References
4News mentions
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