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CVE-2026-54633— PoDoFo: Heap Out-of-Bounds Read in Indexed Color Space Image Decoding (FetchScanLine)

Quick assessment

Affected
podofo podofo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PoDofo 是一个 C++17 PDF 处理库。在 1.0.0 至 1.1.1 版本中，处理一个特制的包含索引（Indexed）色彩空间图像的 PDF 文件时，会在 的 函数中触发堆越界读取（heap out-of-bounds read）。由于 不执行运行时检查，大于或等于 的像素索引可以访问 之后的内存区域。同时， 在验证 时使用了错误的逻辑连接符（conjunction）且未设置上界，导致超出预期范围的、格式错误的索引色彩空间元数据得以通过验证。这种越界读取可能泄露相邻的堆内存数据，或导致处理程序崩溃。该问

CVSS 6.9 · Medium
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I. Basic Information for CVE-2026-54633

Vulnerability Information
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Vulnerability Title
PoDoFo: Heap Out-of-Bounds Read in Indexed Color Space Image Decoding (FetchScanLine)
Source: CVE Program / CVE List V5
Vulnerability Description
PoDoFo is a C++17 PDF manipulation library. From version 1.0.0 until 1.1.1, processing a crafted PDF with an Indexed color-space image can cause a heap out-of-bounds read in PdfColorSpaceFilterIndexed::FetchScanLine in src/podofo/main/PdfColorSpaceFilter.cpp. PODOFO_INVARIANT does not perform a runtime check, so a pixel index greater than or equal to m_MapSize can address beyond m_lookup. PdfColorSpaceFilterFactory::TryCreateFromObject also validates hival with an incorrect conjunction and no upper bound, allowing malformed Indexed color-space metadata outside the expected range. The resulting read can disclose adjacent heap data or crash the processing application. This issue is fixed in version 1.1.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
podofo podofo >= 1.0.0, < 1.1.1 -

II. Public POCs for CVE-2026-54633

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III. Intelligence Information for CVE-2026-54633

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Patches & Fixes for CVE-2026-54633 (1)

Vendor Advisories for CVE-2026-54633 (1)

Vendor Pages for CVE-2026-54633 (1)

IV. Related Vulnerabilities

Same product: podofo
Same vendor: podofo
Same weakness: CWE-125

V. Comments for CVE-2026-54633

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