要点
- CVE-2026-57204 是影响 pypdf, pypdf (py-pdf) 的中危 (CVSS 6.5)漏洞。
- 未来 30 天内被利用的概率（EPSS）：0.37%，高于 30.6% 的漏洞。
- 修复：升级到 6.13.3 或更高版本。
| Package | Affected versions | Patched versions |
|---|
| pypdf PyPI | < 6.13.3
| 6.13.3
|
| pypdf | < 6.13.3
| 6.13.3
|
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value.
Patches
This has been fixed in pypdf==6.13.3.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3871.
NVD description
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3.
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