---
id: CVE-2026-107705
title: >-
  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
summary: >-
  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 passw…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'
cwe:
  - CWE-121
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:35:53.890'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107705'
references:
  - url: 'https://gitlab.freedesktop.org/poppler/poppler'
    label: disclosure@vulncheck.com
  - url: >-
      https://gitlab.freedesktop.org/poppler/poppler/-/blob/poppler-26.10.0/poppler/Decrypt.cc#L1767
    label: disclosure@vulncheck.com
  - url: 'https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2398'
    label: disclosure@vulncheck.com
  - url: 'https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1814'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/poppler-0.42.0-through-26.10.0-stack-buffer-overflow-via-decrypt-revision6hash
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-08T21:07:56.435Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.