CVE-2010-4657

HIGHNVD 7.57.5—

7.5

PHP5 before 5.4.4 allows passing invalid utf-8 strings via the xmlTextWriterWriteAttribute, which are then misparsed by libxml2. This results in memory leak into the resulting output.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 81.8%
KEV: Not listed

Published

November 13, 2019

Last Modified

November 21, 2024

References (8)

secalert@redhathttps://access.redhat.com/security/cve/cve-2010-4657
secalert@redhathttps://bugs.launchpad.net/php/%2Bbug/655442
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4657
secalert@redhathttps://security-tracker.debian.org/tracker/CVE-2010-4657
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/cve-2010-4657
af854a3a-2127-422b-91ae-364da2661108https://bugs.launchpad.net/php/%2Bbug/655442
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4657
af854a3a-2127-422b-91ae-364da2661108https://security-tracker.debian.org/tracker/CVE-2010-4657

Weakness Classification(1)

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

CWE-772Missing Release of Resource after Effective Lifetime

Data Freshness Timeline

(refreshed 9× in last 7d / 9× 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 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 11:50 UTCEG score recompute
2026-05-27 11:50 UTCGHSA enrichment
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:43 UTCepss_batch

Frequently asked(5)

What is CVE-2010-4657?

CVE-2010-4657 is a high vulnerability published on November 13, 2019. PHP5 before 5.4.4 allows passing invalid utf-8 strings via the xmlTextWriterWriteAttribute, which are then misparsed by libxml2. This results in memory leak into the resulting output.

When was CVE-2010-4657 disclosed?

CVE-2010-4657 was first published in the National Vulnerability Database on November 13, 2019, 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.

Is CVE-2010-4657 actively exploited?

CVE-2010-4657 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 81.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2010-4657?

CVE-2010-4657 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2010-4657?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2010-4657, 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

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CVE-2010-4657

📅 Published

🔄 Last Modified

🔗 References (8)