CVE-2018-13421: Fast C++ CSV Parser (aka fast-cpp-csv-parser) before 2018-07-06 has a heap-based buffer over-read in io::trim_

Q: How do I fix CVE-2018-13421?

fast-cpp-csv-parser: upgrade to 2018-07-06. Exact commands for each OS are on this page.

Q: Is CVE-2018-13421 being exploited?

CVE-2018-13421 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-13421 affect?

CVE-2018-13421 affects fast-cpp-csv-parser. Severity is critical (CVSS 9.8). Fast C++ CSV Parser (aka fast-cpp-csv-parser) before 2018-07-06 has a heap-based buffer over-read in io::trim_chars in csv.h.

Q: How urgent is CVE-2018-13421?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-13421 is a critical-severity flaw (CVSS 9.8) affecting fast-cpp-csv-parser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Fast C++ CSV Parser (aka fast-cpp-csv-parser) before 2018-07-06 has a heap-based buffer over-read in io::trim_chars in csv.h.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-125
Published	2018-07-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fast-cpp-csv-parser project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-07-07 17:29 UTCPublished CVE record published
2026-06-17 01:39 UTCUpdated Record last modified

fast-cpp-csv-parser project fast-cpp-csv-parser UPGRADE

Affected: < 2018-07-06

Fixed in: 2018-07-06

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fast-cpp-csv-parser || rpm -q fast-cpp-csv-parser || fast-cpp-csv-parser --version

2. UPGRADE to 2018-07-06 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fast-cpp-csv-parser

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fast-cpp-csv-parser

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-13421?

fast-cpp-csv-parser: upgrade to 2018-07-06. Exact commands for each OS are on this page.

Is CVE-2018-13421 being exploited?

CVE-2018-13421 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-13421 affect?

CVE-2018-13421 affects fast-cpp-csv-parser. Severity is critical (CVSS 9.8). Fast C++ CSV Parser (aka fast-cpp-csv-parser) before 2018-07-06 has a heap-based buffer over-read in io::trim_chars in csv.h.

How urgent is CVE-2018-13421?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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