An issue was discovered in the HttpFoundation component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4.0.x before 4.0.11
Published Jun 13, 2018
5.9
MEDIUMCVSS 3.0
EPSS 1.61%
Description
An issue was discovered in the HttpFoundation component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4.0.x before 4.0.11. The PDOSessionHandler class allows storing sessions on a PDO connection. Under some configurations and with a well-crafted payload, it was possible to do a denial of service on a Symfony application without too much resources.
Affected products
No data.
Configuration 1
- ≥ 2.7.0 · < 2.7.48
- ≥ 2.8.0 · < 2.8.41
- ≥ 3.3.0 · < 3.3.17
- ≥ 3.4.0 · < 3.4.11
- ≥ 4.0.0 · < 4.0.11
Configuration 2
- 9.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.61% (0.01607) | 75.04th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.61% (0.01607) | 72.67th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.13% (0.01128) | 76.35th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.32% (0.02324) | 74.65th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.15% (0.01150) | 77.02th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.48% (0.00483) | 75.64th | v3 (v2023.03.01) |
| Feb 20, 2024 | 0.56% (0.00556) | 76.96th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.56% (0.00556) | 74.96th | v3 (v2023.03.01) |
| Nov 4, 2023 | 0.48% (0.00483) | 73.32th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.68% (0.00680) | 77.45th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.74% (0.00745) | 77.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.55% (0.01550) | 33.66th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.55% (0.01550) | 0.00th | v1 |
References (13)
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2018-11386.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2018-11386.yaml
- https://github.com/advisories/GHSA-r2rq-3h56-fqm4 Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH/
- https://nvd.nist.gov/vuln/detail/CVE-2018-11386
- https://symfony.com/blog/cve-2018-11386-denial-of-service-when-using-pdosessionhandler x_refsource_CONFIRMVendor Advisory
- https://symfony.com/cve-2018-11386
- https://www.debian.org/security/2018/dsa-4262 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.