What is CVE-2018-11128?

CVE-2018-11128 is a high-severity vulnerability in Pdfparser, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-05-17.

How severe is CVE-2018-11128?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2018-11128 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Pdfparser

CVE-2018-11128

The ObjReader::ReadObj() function in ObjReader.cpp in vincent0629 PDFParser allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly execute arbitrary code via a crafted pdf file.

Vulnerability class: Buffer Overflow

Published 2018-05-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (75.9th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: -0.000

Affected products

Pdfparser

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

seclists.org/fulldisclosure/2018/May/44 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-11128?: CVE-2018-11128 is a high-severity vulnerability in Pdfparser, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-05-17.
How severe is CVE-2018-11128?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2018-11128 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.