CVE-2026-107705
Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash()
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-121 |
| Vendor | freedesktop |
| Product | poppler |
| Published | Oct 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
freedesktop / poppler
0.42.0 ≤ 26.10.0
References
gitlab.freedesktop.org: https://gitlab.freedesktop.org/poppler/poppler/-/work_items/1814 gitlab.freedesktop.org: https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2398 gitlab.freedesktop.org: https://gitlab.freedesktop.org/poppler/poppler/-/blob/poppler-26.10.0/poppler/Decrypt.cc#L1767 gitlab.freedesktop.org: https://gitlab.freedesktop.org/poppler/poppler vulncheck.com: https://www.vulncheck.com/advisories/poppler-0.42.0-through-26.10.0-stack-buffer-overflow-via-decrypt-revision6hash
Credits
Aziz Elbelaychy (Ostorlab)