CVE-2020-18831

HIGHCVSS 7.8

7.8

Buffer Overflow vulnerability in tEXtToDataBuf function in pngimage.cpp in Exiv2 0.27.1 allows remote attackers to cause a denial of service and other unspecified impacts via use of crafted file.

CVSS v3: 7.8
EG Score: —
EPSS: —
KEV: Not listed

Published

August 22, 2023

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://github.com/Exiv2/exiv2/issues/828
cve@mitrehttps://www.exiv2.org/download.html
af854a3a-2127-422b-91ae-364da2661108https://github.com/Exiv2/exiv2/issues/828
af854a3a-2127-422b-91ae-364da2661108https://www.exiv2.org/download.html

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
exiv2	0.1 ... 0.17.5 (28 versions)	—	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 18:59 UTCEG score recompute
2026-05-24 18:59 UTCGHSA enrichment
2026-05-24 16:48 UTCepss_batch

Frequently asked(4)

What is CVE-2020-18831?

CVE-2020-18831 is a high vulnerability published on August 22, 2023. Buffer Overflow vulnerability in tEXtToDataBuf function in pngimage.cpp in Exiv2 0.27.1 allows remote attackers to cause a denial of service and other unspecified impacts via use of crafted file.

When was CVE-2020-18831 disclosed?

CVE-2020-18831 was first published in the National Vulnerability Database on August 22, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

What is the CVSS score of CVE-2020-18831?

CVE-2020-18831 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2020-18831?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-18831, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-18831

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