VDB
RHSA-2026:57010
RHSA-2026:57010
PUBLISHED
CVSS 2.799999952316284 LOW
A flaw was found in the `csv.Sniffer.sniff()` function within Python. An attacker can exploit this by providing specially crafted CSV samples, which can trigger super-linear regular-expression processing during dialect sniffing. This excessive processing consumes significant CPU resources, potentially leading to a Denial of Service (DoS) for applications that process unbounded input using this function.
Risk Scores
CVSS 3.1
2.799999952316284
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | python3-10-main@aarch64 as a component of Red Hat Hardened Images | * |
| Red Hat | python3-10-main@src as a component of Red Hat Hardened Images | * |
| Red Hat | python3-10-main@x86_64 as a component of Red Hat Hardened Images | * |
Timeline
- Aug 19, 2026 CVE Published
- Sep 6, 2026 CVE Updated
- Sep 6, 2026 Distribution Patch
- Sep 6, 2026 Distribution Patch
- Sep 6, 2026 Security Advisory
- Sep 6, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:57010 advisory
- https://images.redhat.com/ advisory
- https://access.redhat.com/security/cve/CVE-2026-18503 advisory
- https://access.redhat.com/security/updates/classification/ advisory
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_57010.json advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2513510 issue
- https://www.cve.org/CVERecord?id=CVE-2026-18503 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-18503 advisory
- https://github.com/python/cpython/issues/98820 advisory
- https://github.com/python/cpython/pull/153694 advisory
- https://mail.python.org/archives/list/security-announce@python.org/thread/KQ7NBMCPAZJHRROQXJQE4GMXGLD5KHBS/ advisory