Buffer overflow in Freedesktop Poppler
CVE-2026-107705
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- gitlab.freedesktop.org/poppler/poppler/-/work_items/1814 (issue-tracking)
- gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2398 (patch)
- gitlab.freedesktop.org/poppler/poppler/-/blob/poppler-26.10.0/poppler/Decrypt.cc (technical-description)
- gitlab.freedesktop.org/poppler/poppler (product)
- www.vulncheck.com/advisories/poppler-0.42.0-through-26.10.0-stack-buffer-overfl… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-107705?
- CVE-2026-107705 is a medium-severity vulnerability in Freedesktop Poppler, classified under Stack-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-10-08.
- How severe is CVE-2026-107705?
- Medium severity. CVSS v3 base score is 6.5 out of 10.