CVE-2026-107705 Poppler 0.42.0 through 26.10.0 Stack Buffer Overflow via Decrypt::revision6Hash()
Attackers can trigger a stack buffer overflow in Poppler by supplying an overly long password for encrypted PDFs, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107705?
CVE-2026-107705 is a high-severity memory corruption vulnerability in freedesktop poppler, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2026-107705?
Linux distribution packages (21)
poppler Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-cpp Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-cpp Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-cpp-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-cpp-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-glib Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-glib Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-glib-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-glib-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-glib-doc Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-glib-doc Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-qt6 Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-qt6 Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-qt6-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-qt6-devel Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler-utils Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.3.hum1 |
poppler-utils Red Hat:hummingbird:1 | All versions | 0:26.08.0-1.4.hum1 |
poppler openSUSE:Tumbleweed | All versions | 26.10.0-1.1 |
How do I fix CVE-2026-107705?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-107705 being exploited?
There is no known exploitation of CVE-2026-107705 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-107705, CLSA-2026-1791810115, DEBIAN-CVE-2026-107705, ECHO-401d-da1f-058c, GHSA-939q-g65h-55jw, RHSA-2026:80172 and 4 more.