CVE-2018-6519
SimpleSAMLphp SAML2 library Regular Expression Denial of Service vulnerability
CVE-2018-6519 is a high vulnerability (CVSS 7.5) in Simplesamlphp Saml2, published February 2, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.70%, the 77th percentile. Fixed in simplesamlphp/saml2 1.10.4.
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
CVE-2018-6519- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-74
- Updated
- 2026-11-02
CVE List No score
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
CVE-2018-6519- Updated
- 2026-11-02
EUVDEUVD-2022-4159 No score
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
EUVD-2022-4159- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hhm8-2j4g-mpgg
SimpleSAMLphp SAML2 library Regular Expression Denial of Service vulnerability
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
GHSA-hhm8-2j4g-mpgg- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-74
- Updated
- 2026-11-02
OSV
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
CVE-2018-6519- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-6519
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
DEBIAN-CVE-2018-6519- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-hhm8-2j4g-mpgg
SimpleSAMLphp SAML2 library Regular Expression Denial of Service vulnerability
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
GHSA-hhm8-2j4g-mpgg- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-74
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-6519
The SAML2 library before 1.10.4, 2.x before 2.3.5, and 3.x before 3.1.1 in SimpleSAMLphp has a Regular Expression Denial of Service vulnerability for fraction-of-seconds data in a timestamp.
- Record
UBUNTU-CVE-2018-6519- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
simplesamlphp/saml2Packagist |
before 1.10.4 | 1.10.4 |
simplesamlphp/saml2Packagist |
2.0 up to 2.3.5 | 2.3.5 |
simplesamlphp/saml2Packagist |
3.0 up to 3.1.1 | 3.1.1 |
simplesamlphpDebian:12 |
before 1.15.2-1 | 1.15.2-1 |
simplesamlphpDebian:14 |
before 1.15.2-1, plus listed versions 1.10.0-11.11.0-11.12.0-11.12.0~rc1-11.12.0~rc2-1 Show 36 moreShow less1.13.0-11.13.1-11.13.1-21.13.2-11.14.0-11.14.1-11.14.10-11.14.11-11.14.15-11.14.2-11.14.2-21.14.3-11.14.4-11.14.5-11.14.6-11.14.7-11.14.8-11.14.9-11.15.0-11.15.1-11.6.0-11.6.1-11.6.2-11.6.3-11.6.3-21.6.3-31.7.0-11.7.0-21.8.0-11.8.1-11.8.2-11.9.0-11.9.0~rc1-11.9.0~rc2-11.9.1-11.9.2-1 |
1.15.2-1 |
simplesamlphpDebian:8 |
before 1.13.1-2+deb8u1, plus listed versions 1.13.1-2 |
1.13.1-2+deb8u1 |
simplesamlphpDebian:9 |
before 1.14.11-1+deb9u1, plus listed versions 1.14.11-1 |
1.14.11-1+deb9u1 |
simplesamlphp/saml2Packagist |
before 1.10.4, plus listed versions v0.1.0v0.1.0-alphav0.3.0v0.4.0v0.4.1 Show 38 moreShow lessv0.4.2v0.5.0v0.6.0v0.6.1v0.6.2v0.6.3v0.6.4v0.7.0v0.7.1v0.8.0v0.8.1v1.0.0v1.1.0v1.10v1.10.1v1.10.2v1.10.3v1.2.0v1.3.0v1.3.1v1.3.2v1.4.0v1.5.0v1.5.1v1.5.2v1.5.3v1.5.4v1.6.0v1.6.1v1.7.0v1.7.1v1.7.2v1.8v1.8.1v1.8.2v1.9v1.9.1v1.9.2 |
1.10.4 |
simplesamlphp/saml2Packagist |
2.0 up to 2.3.5, plus listed versions v2.0.0v2.0.1v2.1v2.2v2.3 Show 4 moreShow lessv2.3.1v2.3.2v2.3.3v2.3.4 |
2.3.5 |
simplesamlphp/saml2Packagist |
3.0 up to 3.1.1, plus listed versions v3.0.0v3.0.1v3.0.2v3.0.3v3.1.0 |
3.1.1 |
simplesamlphpUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1.13.2-11.14.0-11.14.0-1ubuntu21.14.0-1ubuntu2+esm1 |
None known |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |