Low severity · published Aug 4, 2026
CVE-2026-18739
Popt-devel: popt-static: off-by-one in poptstuffargs
2.5
CVSS
0.1%
EPSS
No
On KEV
Description
A flaw was found in popt, a command-line option parsing library. An off-by-one error in the poptStuffArgs function, when repeatedly called by a host application or through deep alias nesting, can lead to corruption of internal program data. This corruption could potentially enable a local attacker to execute arbitrary code if the host application then unsafely processes the altered data.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 6 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4 · Red Hat
All versions, or not specified · source: vendor
PO
popt · rpm-software-management
1.1.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18739
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18739
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:56984
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-18739
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2510737
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