VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 7.8 highEPSS 1.1% probability of exploitation in 30 daysFound by AI: AISLE
Red Hat

CVE-2026-84838: Rpm: command injection in rpmuncompress via unescaped filenames passed to popen()

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
1.1%

EPSS score, percentile 65.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
7.8 High

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Unaffected 6.1.0-1.3.hum1

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Workaround (from the CVE record)

To mitigate this issue, avoid processing untrusted archive filenames with `rpmuncompress` or any workflows that invoke `%{__rpmuncompress}`. Before any build or extraction steps, rename source and patch archives to remove any shell metacharacters from their filenames.

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Red Hat Red Hat Hardened Images
StatusVersions
Unaffected6.1.0-1.3.hum1

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 10
StatusVersions

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 6
StatusVersions

Versions not listed are: unaffected.

Red Hat Red Hat Enterprise Linux 7
StatusVersions

Versions not listed are: unaffected.

Red Hat Red Hat Enterprise Linux 8
StatusVersions

Versions not listed are: unaffected.

Red Hat Red Hat Enterprise Linux 9
StatusVersions

Versions not listed are: unaffected.

Versions the record lists as unaffected: 6.1.0-1.3.hum1.

Source: CVE List, as of . About the data.

About this vulnerability

A flaw was found in rpmuncompress. This command injection vulnerability allows a local attacker to execute arbitrary commands. This occurs when rpmuncompress processes a specially crafted archive filename containing shell metacharacters, which are not properly escaped before being passed to shell command strings. Successful exploitation requires user interaction, where a user or automated workflo…

Summary: CVE record, as of .

  • CISA has not added CVE-2026-84838 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 2 Sep 2026.
  • The CVE record carries a CVSS v3.1 base score of 7.8 (High), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 1.1% (percentile 65.7), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact total.
  • The credits in the CVE record name AISLE as finder.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

Rpm: command injection in rpmuncompress via unescaped filenames passed to popen()

A flaw was found in rpmuncompress. This command injection vulnerability allows a local attacker to execute arbitrary commands. This occurs when rpmuncompress processes a specially crafted archive filename containing shell metacharacters, which are not properly escaped before being passed to shell command strings. Successful exploitation requires user interaction, where a user or automated workflow invokes rpmuncompress on the malicious file, leading to high impact on the confidentiality, integrity, and availability of data accessible to the invoking user.

Source: CVE List, as of . About the data.

Weakness

CWE-78

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

References

2

Known exploited Red Hat vulnerabilities

  • CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability (added )
  • CVE-2015-5287: Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability (added )
  • CVE-2018-14667: Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability (added )
  • CVE-2021-3560: Red Hat Polkit Incorrect Authorization Vulnerability (added )
  • CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability (added )