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CVE-2026-107705— Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash()

Quick assessment

Affected
freedesktop poppler
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.

Poppler 0.42.0 至 26.10.0 版本中存在一个栈缓冲区溢出漏洞，位于 Decrypt::revision6Hash() 函数中。当打开使用 AES-V3/R6 加密的 PDF 文件时，攻击者若能控制密码，即可覆盖栈内存。攻击者可通过使用 libpoppler、libpoppler-glib 或 C++ API 的应用程序，提供长度超过 127 字节的密码，从而溢出 K1 和 E 缓冲区，导致进程崩溃或内存损坏。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-107705

Vulnerability Information
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Vulnerability Title
Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash()
Source: CVE Program / CVE List V5
Vulnerability Description
Poppler 0.42.0 through 26.10.0 contains a stack-based buffer overflow in Decrypt::revision6Hash() that allows attackers controlling the password to overwrite stack memory when opening AESV3/R6 encrypted PDFs. Attackers can supply a password longer than 127 bytes through applications using the libpoppler, libpoppler-glib or C++ API to overflow the K1 and E buffers, crashing the process or corrupting memory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
freedesktop poppler 0.42.0 ~ 26.10.0 -

II. Public POCs for CVE-2026-107705

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III. Intelligence Information for CVE-2026-107705

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Other References for CVE-2026-107705 (5)

IV. Related Vulnerabilities

Same product: poppler
Same vendor: freedesktop
Same weakness: CWE-121

V. Comments for CVE-2026-107705

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