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CRITICAL

CVE-2021-29476

CVSS v3

9.8

CRITICAL

EPSS Score

2.1 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • rmccue/requestsPackagistfrom 1.6.0 · fixed in 1.8.0

Vendor advisories

  • CVE-2021-29476 Red Hat Product Security

    php-rmccue-requests: Insecure Deserialization of untrusted data

Full record on NVD

Description

Requests is a HTTP library written in PHP. Requests mishandles deserialization in FilteredIterator. The issue has been patched and users of `Requests` 1.6.0, 1.6.1 and 1.7.0 should update to version 1.8.0.

Technical details

Published
2021-04-27

Frequently asked questions

What is CVE-2021-29476?

Requests is a HTTP library written in PHP. Requests mishandles deserialization in FilteredIterator. The issue has been patched and users of `Requests` 1.6.0, 1.6.1 and 1.7.0 should update to version 1.8.0.

Is CVE-2021-29476 actively exploited?

Active exploitation of CVE-2021-29476 has not been confirmed. Its EPSS score was 2.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-29476?

CVE-2021-29476 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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