CVE-2026-18739
Last modified
CVE-2026-18739 is a low-severity vulnerability rated 2.5/10 on the CVSS scale. 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. EPSS estimates a 0.10% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| rpm-software-management | popt | >= 1.1.1, < * |
| Red Hat | Red Hat Enterprise Linux 10 | All versions |
| Red Hat | Red Hat Enterprise Linux 6 | All versions |
| Red Hat | Red Hat Enterprise Linux 7 | All versions |
| Red Hat | Red Hat Enterprise Linux 8 | All versions |
| Red Hat | Red Hat Enterprise Linux 9 | All versions |
| Red Hat | Red Hat Hardened Images | All versions |
| Red Hat | Red Hat OpenShift Container Platform 4 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-18739?
How severe is CVE-2026-18739?
How do I fix CVE-2026-18739?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-18722A vulnerability was found in diaowen DWSurvey up to 6.14.0. …6.3
- CVE-2026-18723A vulnerability was determined in diaowen DWSurvey up to 6.1…6.3
- CVE-2026-18733A prompt injection vulnerability in the shell tool in Amazon…8.8
- CVE-2026-18736Shlink contains a server-side request forgery vulnerability …5.3
- CVE-2026-18737Shlink contains a blind SQL injection vulnerability that all…7.1
- CVE-2026-18738Shlink versions 5.0.0 through 5.1.5 contain a CSV formula in…4.7
- CVE-2026-1874Always-Incorrect Control Flow Implementation vulnerability i…7.5
- CVE-2026-1875Improper Resource Shutdown or Release vulnerability in Mitsu…7.5
- CVE-2026-18753The product firmware contains an embedded, static RSA privat…9.1
- CVE-2026-18754The product firmware contains an embedded, static RSA privat…9.1
- CVE-2026-18755A DLL hijacking vulnerability in GeoVision GV-ASManager allo…7.3
- CVE-2026-18759The background service of ABP or AES runs as NT AUTHORITY\SY…8.5
Are you affected by CVE-2026-18739?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST