Python
CVE-2026-28804
MEDIUM
GHSA-9m86-7pmv-2852
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3Blast Radius
ecosystem impact- 14 pypi packages depend on pypdf (12 direct, 3 indirect)
Ecosystem-wide dependent count for version 6.7.5.
DescriptionGitHub Advisory
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.
AnalysisAI
pypdf versions prior to 6.7.5 are vulnerable to denial-of-service attacks where specially crafted PDF files with ASCIIHexDecode filtered streams can cause excessive processing time and application hang. An unauthenticated attacker can exploit this by providing a malicious PDF that consumes significant computational resources when processed. A patch is available in version 6.7.5 and later.
Technical ContextAI
Affects Pypdf. pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.
RemediationAI
A vendor patch is available — apply it immediately. Fixed in version 6.7.5.. Restrict network access to the affected service where possible.
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View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Leap 16.0 | Fixed |
| openSUSE Tumbleweed | Fixed |
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External POC / Exploit Code
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