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CVE-2020-28949

7.8, high Known exploited

PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
7.8, high high CVSS v3.1
EPSS, next 30 days
85% higher than 99.7% of scored CVEs
Exploitation
Confirmed in the wild
Published
19 Nov 20205 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 25 Aug 2022. US federal agencies had to remediate by 15 Sept 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

Description

Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.

Details

Vendor
PEAR and 3 more
Product
Archive Tar
Weakness
n/a
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References 13

Exploit code 2

Advisories 10

2 more

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other PEAR CVEs

Every PEAR CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2020-36193 PEAR Archive_Tar Improper Link Resolution Vulnerability KEV EPSS 71% 7.5, high

Beyond this page

Is CVE-2020-28949 in your network?

This page tells you how dangerous CVE-2020-28949 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2020-28949 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2020-28949 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 16 Oct 2026, not the live upstream state.