CVE-2026-48735— pypdf: Manipulated XMP metadata streams can exhaust RAM
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-48735
Vulnerability Information
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Vulnerability Title
pypdf: Manipulated XMP metadata streams can exhaust RAM
Source: NVD (National Vulnerability Database)
Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.1, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements. This vulnerability is fixed in 6.12.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
pypdf 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pypdf是py-pdf开源的一个免费开源的纯 python PDF 库。能够拆分、合并、裁剪和转换 PDF 文件的页面。 pypdf 6.12.1之前版本存在安全漏洞，该漏洞源于解析大型XMP元数据时可能包含大量不必要的元素，可能导致攻击者制作PDF导致大量内存使用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-48735
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Patches & Fixes for CVE-2026-48735 (1)
Vendor Advisories for CVE-2026-48735 (1)
Vendor Pages for CVE-2026-48735 (1)
- 🔗 Release Version 6.12.1, 2026-05-22 · py-pdf/pypdf · GitHubx_refsource_MISC
Same Patch Batch · py-pdf · 2026-05-28 · 3 CVEs total
| CVE-2026-48156 | pypdf: Possible long runtimes for zero-only width values in cross-reference streams | |
| CVE-2026-48155 | pypdf: Possible large memory usage for large offsets for layout mode text |
IV. Related Vulnerabilities
Same product: pypdf
- CVE-2026-48155
pypdf: Possible large memory usage for large offsets for lay - CVE-2026-48156
pypdf: Possible long runtimes for zero-only width values in - CVE-2026-41314
pypdf: Manipulated FlateDecode image dimensions can exhaust - CVE-2026-41313
pypdf: Possible long runtimes for wrong size values in incre - CVE-2026-41312
pypdf: Manipulated FlateDecode predictor parameters can exha
Same vendor: py-pdf
- CVE-2026-48155
pypdf: Possible large memory usage for large offsets for lay - CVE-2026-48156
pypdf: Possible long runtimes for zero-only width values in - CVE-2026-41314
pypdf: Manipulated FlateDecode image dimensions can exhaust - CVE-2026-41313
pypdf: Possible long runtimes for wrong size values in incre - CVE-2026-41312
pypdf: Manipulated FlateDecode predictor parameters can exha
Same weakness: CWE-770
- CVE-2026-48854
Unbounded request body accumulation causes memory exhaustion - CVE-2026-8683
Overly long URLs crash the Mattermost Desktop App - CVE-2026-53522
Nezha Monitoring: Unbounded WebSocket Streams — Resource Exh - CVE-2026-50560
Netty susceptible to HTTP/2 Reset Attack with different on-t - CVE-2026-48748
Netty HTTP/3 QPACK Blocked Streams Memory Exhaustion
V. Comments for CVE-2026-48735
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