Buffer Overflow vulnerability in HtmlOutputDev::page in poppler 0.75.0 allows attackers to cause a denial of service.

published 2023-08-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2020-10752

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

Patch / fix

distros 1

poppler Debian 14, Debian 13, Debian 12 0.85.0-2

debian advisories DEBIAN-CVE-2020-18839

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-18839 updated 2026-11-05 cvss 6.5

poppler: buffer overflow in HtmlOutputDev::page

Red Hat Enterprise Linux 6 poppler, poppler-qt, poppler-qt4, poppler-glib, poppler-utils Red Hat Enterprise Linux 7 poppler, poppler-qt, poppler-cpp, poppler-glib, poppler-demos, poppler-utils, +4 more Red Hat Enterprise Linux 8 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils, cups-container, +1 more Red Hat Enterprise Linux 9 poppler, poppler-cpp, poppler-qt5, poppler-glib, poppler-utils, cups-container, +1 more
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-04)

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

gitlab.freedesktop.org https://gitlab.freedesktop.org/poppler/poppler/issues/742 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Classification

Weakness

CWE-787 Out-of-bounds Write

References

gitlab.freedesktop.org /poppler/poppler/issues/742
exploit, issue-tracking, vendor-advisory

Sources

CVE List CVE-2020-18839
NVD CVE-2020-18839

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary