CWE-208
AllowedObservable Timing Discrepancy
Abstraction: Base · Status: Incomplete
Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
367 vulnerabilities reference this CWE, most recent first.
GHSA-C5XQ-JJWJ-X369
Vulnerability from github – Published: 2026-07-22 15:31 – Updated: 2026-07-22 15:31In Progress® Telerik® UI for AJAX prior to v2026.2.708, RadAsyncUpload upload metadata processing may leak cryptographic validity through measurable timing differences, enabling remote attackers to recover protected metadata values.
{
"affected": [],
"aliases": [
"CVE-2026-13183"
],
"database_specific": {
"cwe_ids": [
"CWE-208"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-22T14:17:13Z",
"severity": "HIGH"
},
"details": "In Progress\u00ae Telerik\u00ae UI for AJAX prior to v2026.2.708, RadAsyncUpload upload metadata processing may leak cryptographic validity through measurable timing differences, enabling remote attackers to recover protected metadata values.",
"id": "GHSA-c5xq-jjwj-x369",
"modified": "2026-07-22T15:31:22Z",
"published": "2026-07-22T15:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13183"
},
{
"type": "WEB",
"url": "https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rau-timing-oracle-CVE-2026-13183"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-C6C4-7X48-4CQP
Vulnerability from github – Published: 2021-04-19 14:47 – Updated: 2021-10-08 21:24Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:flow-server versions 1.0.0 through 1.0.13 (Vaadin 10.0.0 through 10.0.16), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.4.6 (Vaadin 14.0.0 through 14.4.6), 3.0.0 prior to 5.0.0 (Vaadin 15 prior to 18), and 5.0.0 through 5.0.2 (Vaadin 18.0.0 through 18.0.5) allows attacker to guess a security token via timing attack.
- https://vaadin.com/security/cve-2021-31404
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin-bom"
},
"ranges": [
{
"events": [
{
"introduced": "10.0.0"
},
{
"fixed": "10.0.17"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin-bom"
},
"ranges": [
{
"events": [
{
"introduced": "11.0.0"
},
{
"fixed": "14.4.7"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.vaadin:vaadin-bom"
},
"ranges": [
{
"events": [
{
"introduced": "15.0.0"
},
{
"fixed": "18.0.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-208"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-16T23:13:25Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "Non-constant-time comparison of CSRF tokens in UIDL request handler in `com.vaadin:flow-server` versions 1.0.0 through 1.0.13 (Vaadin 10.0.0 through 10.0.16), 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14), 2.0.0 through 2.4.6 (Vaadin 14.0.0 through 14.4.6), 3.0.0 prior to 5.0.0 (Vaadin 15 prior to 18), and 5.0.0 through 5.0.2 (Vaadin 18.0.0 through 18.0.5) allows attacker to guess a security token via timing attack.\n\n- https://vaadin.com/security/cve-2021-31404",
"id": "GHSA-c6c4-7x48-4cqp",
"modified": "2021-10-08T21:24:15Z",
"published": "2021-04-19T14:47:47Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/vaadin/platform/security/advisories/GHSA-c6c4-7x48-4cqp"
},
{
"type": "PACKAGE",
"url": "https://github.com/vaadin/platform"
},
{
"type": "WEB",
"url": "https://vaadin.com/security/cve-2021-31404"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18"
}
GHSA-C6WG-CM5X-RQVJ
Vulnerability from github – Published: 2023-03-07 17:38 – Updated: 2023-03-07 17:38Impact
There is an observable discrepancy in the authentication response time between calls where the user provided exists and calls where it does not. This issue only affects calls using the internal basic identity provider (IdP), and not other externally configured IdPs.
Patches
OpenSearch 1.3.9 and 2.6.0
Workarounds
None.
References
If you have any questions or comments about this advisory, please contact AWS/Amazon Security using our issue reporting page [1] or directly via email [2]. Please do not create a public GitHub issue.
[1] AWS Security issue reporting page: https://aws.amazon.com/security/vulnerability-reporting/ [2] AWS Security email: aws-security@amazon.com
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.opensearch.plugin:opensearch-security"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.3.9"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.opensearch.plugin:opensearch-security"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.6.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-25806"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-208"
],
"github_reviewed": true,
"github_reviewed_at": "2023-03-07T17:38:38Z",
"nvd_published_at": "2023-03-02T04:15:00Z",
"severity": "MODERATE"
},
"details": "### Impact\nThere is an observable discrepancy in the authentication response time between calls where the user provided exists and calls where it does not. This issue only affects calls using the internal basic identity provider (IdP), and not other externally configured IdPs.\n\n### Patches\nOpenSearch 1.3.9 and 2.6.0\n\n### Workarounds\nNone.\n\n### References\nIf you have any questions or comments about this advisory, please contact AWS/Amazon Security using our issue reporting page [1] or directly via email [2]. Please do not create a public GitHub issue.\n\n[1] AWS Security issue reporting page: https://aws.amazon.com/security/vulnerability-reporting/\n[2] AWS Security email: [aws-security@amazon.com](mailto:aws-security@amazon.com)",
"id": "GHSA-c6wg-cm5x-rqvj",
"modified": "2023-03-07T17:38:38Z",
"published": "2023-03-07T17:38:38Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/opensearch-project/security/security/advisories/GHSA-c6wg-cm5x-rqvj"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-25806"
},
{
"type": "WEB",
"url": "https://github.com/opensearch-project/security/pull/2472"
},
{
"type": "PACKAGE",
"url": "https://github.com/opensearch-project/security"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "OpenSearch has time discrepancy in authentication responses"
}
GHSA-C7RP-5PRQ-C624
Vulnerability from github – Published: 2024-02-02 18:30 – Updated: 2024-02-09 21:30Dell BSAFE Micro Edition Suite, versions before 4.5.2, contain an Observable Timing Discrepancy Vulnerability.
{
"affected": [],
"aliases": [
"CVE-2021-21575"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-208"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-02T16:15:45Z",
"severity": "MODERATE"
},
"details": "\nDell BSAFE Micro Edition Suite,\u00a0versions before 4.5.2, contain an Observable Timing Discrepancy Vulnerability.\n\n",
"id": "GHSA-c7rp-5prq-c624",
"modified": "2024-02-09T21:30:57Z",
"published": "2024-02-02T18:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21575"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-us/000189462/dsa-2021-131-dell-bsafetm-micro-edition-suite-multiple-vulnerabilities"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-C929-WGPC-H7F5
Vulnerability from github – Published: 2025-03-11 03:30 – Updated: 2025-03-11 03:30IBM Common Cryptographic Architecture 7.0.0 through 7.5.51
could allow a remote attacker to obtain sensitive information during the creation of ECDSA signatures to perform a timing-based attack.
{
"affected": [],
"aliases": [
"CVE-2024-22340"
],
"database_specific": {
"cwe_ids": [
"CWE-208"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-11T01:15:33Z",
"severity": "MODERATE"
},
"details": "IBM Common Cryptographic Architecture 7.0.0 through 7.5.51 \n\n\n\ncould allow a remote attacker to obtain sensitive information during the creation of ECDSA signatures to perform a timing-based attack.",
"id": "GHSA-c929-wgpc-h7f5",
"modified": "2025-03-11T03:30:49Z",
"published": "2025-03-11T03:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-22340"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7185282"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-C9G9-V2J9-8FFV
Vulnerability from github – Published: 2026-07-20 09:31 – Updated: 2026-07-20 21:31Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.
The check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.
{
"affected": [],
"aliases": [
"CVE-2026-6656"
],
"database_specific": {
"cwe_ids": [
"CWE-208"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-20T07:16:42Z",
"severity": "HIGH"
},
"details": "Crypt::Password versions through 0.28 for Perl are susceptible to timing attacks.\n\nThe check_password method uses the built-in eq operator. This allows discrepancies in timing to be used to guess the underlying hash.",
"id": "GHSA-c9g9-v2j9-8ffv",
"modified": "2026-07-20T21:31:44Z",
"published": "2026-07-20T09:31:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6656"
},
{
"type": "WEB",
"url": "https://metacpan.org/release/DRSTEVE/Crypt-Password-0.28/source/lib/Crypt/Password.pm#L190-193"
},
{
"type": "WEB",
"url": "https://rt.cpan.org/Ticket/Display.html?id=180162"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2026/07/20/4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-CVW2-XJ8R-MJF7
Vulnerability from github – Published: 2021-03-09 00:45 – Updated: 2023-09-05 22:00The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.
Recommendation
This has been fixed in version 2.0.0. All users are advised to update to this version or later.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.1.3"
},
"package": {
"ecosystem": "RubyGems",
"name": "activerecord-session_store"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-25025"
],
"database_specific": {
"cwe_ids": [
"CWE-208"
],
"github_reviewed": true,
"github_reviewed_at": "2021-03-09T00:45:19Z",
"nvd_published_at": "2021-03-05T06:15:00Z",
"severity": "MODERATE"
},
"details": "The `activerecord-session_store` (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782. \n\n## Recommendation\n\nThis has been fixed in version 2.0.0. All users are advised to update to this version or later.",
"id": "GHSA-cvw2-xj8r-mjf7",
"modified": "2023-09-05T22:00:39Z",
"published": "2021-03-09T00:45:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-25025"
},
{
"type": "WEB",
"url": "https://github.com/rails/activerecord-session_store/pull/151"
},
{
"type": "WEB",
"url": "https://github.com/rails/activerecord-session_store/commit/9d4dd113d3010b82daaadf0b0ee6b9fb2afb2160"
},
{
"type": "PACKAGE",
"url": "https://github.com/rails/activerecord-session_store"
},
{
"type": "WEB",
"url": "https://github.com/rails/activerecord-session_store/releases/tag/v2.0.0"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/activerecord-session_store/CVE-2019-25025.yml"
},
{
"type": "WEB",
"url": "https://rubygems.org/gems/activerecord-session_store"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Activerecord-session_store Vulnerable to Timing Attack"
}
GHSA-CX8R-G3C8-JCFG
Vulnerability from github – Published: 2026-08-11 18:30 – Updated: 2026-08-11 18:30Observable Timing Discrepancy in the AMD Vitis Libraries ECDSA secp256k1 component could allow attackers with local access to potentially perform timing analysis or electromagnetic emanation attacks, resulting in high confidentiality and integrity impact due to the exposure of private cryptographic keys.
{
"affected": [],
"aliases": [
"CVE-2026-43606"
],
"database_specific": {
"cwe_ids": [
"CWE-208"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-11T17:17:58Z",
"severity": "HIGH"
},
"details": "Observable Timing Discrepancy in the AMD Vitis Libraries ECDSA secp256k1 component could allow attackers with local access to potentially perform timing analysis or electromagnetic emanation attacks, resulting in high confidentiality and integrity impact due to the exposure of private cryptographic keys.",
"id": "GHSA-cx8r-g3c8-jcfg",
"modified": "2026-08-11T18:30:55Z",
"published": "2026-08-11T18:30:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43606"
},
{
"type": "WEB",
"url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-8015.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-F34Q-F47H-V25C
Vulnerability from github – Published: 2026-08-13 09:31 – Updated: 2026-08-13 09:31Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 2.1.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.
{
"affected": [],
"aliases": [
"CVE-2026-16459"
],
"database_specific": {
"cwe_ids": [
"CWE-208"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-13T09:17:12Z",
"severity": "MODERATE"
},
"details": "Padding oracle attack vulnerability in Oberon microsystem AG\u2019s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 2.1.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.",
"id": "GHSA-f34q-f47h-v25c",
"modified": "2026-08-13T09:31:10Z",
"published": "2026-08-13T09:31:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16459"
},
{
"type": "WEB",
"url": "https://www.oberon.ch/security-advisories/cve-2026-16459"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-F9F9-4R63-4QCC
Vulnerability from github – Published: 2022-10-19 19:00 – Updated: 2022-12-16 17:22GitLab Plugin 1.5.35 and earlier does not use a constant-time comparison when checking whether the provided and expected webhook token are equal.
This could potentially allow attackers to use statistical methods to obtain a valid webhook token.
GitLab Plugin 1.5.36 uses a constant-time comparison when validating the webhook token.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.5.35"
},
"package": {
"ecosystem": "Maven",
"name": "org.jenkins-ci.plugins:gitlab-plugin"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.36"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-43411"
],
"database_specific": {
"cwe_ids": [
"CWE-203",
"CWE-208"
],
"github_reviewed": true,
"github_reviewed_at": "2022-10-19T22:22:43Z",
"nvd_published_at": "2022-10-19T16:15:00Z",
"severity": "LOW"
},
"details": "GitLab Plugin 1.5.35 and earlier does not use a constant-time comparison when checking whether the provided and expected webhook token are equal.\n\nThis could potentially allow attackers to use statistical methods to obtain a valid webhook token.\n\nGitLab Plugin 1.5.36 uses a constant-time comparison when validating the webhook token.",
"id": "GHSA-f9f9-4r63-4qcc",
"modified": "2022-12-16T17:22:29Z",
"published": "2022-10-19T19:00:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-43411"
},
{
"type": "WEB",
"url": "https://github.com/jenkinsci/gitlab-plugin/commit/882f84c6a42b42b74ff7c9803d814f61b8fde0ed"
},
{
"type": "PACKAGE",
"url": "https://github.com/jenkinsci/gitlab-plugin"
},
{
"type": "WEB",
"url": "https://www.jenkins.io/security/advisory/2022-10-19/#SECURITY-2877"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2022/10/19/3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Non-constant time webhook token comparison in Jenkins GitLab Plugin"
}
No mitigation information available for this CWE.
CAPEC-462: Cross-Domain Search Timing
An attacker initiates cross domain HTTP / GET requests and times the server responses. The timing of these responses may leak important information on what is happening on the server. Browser's same origin policy prevents the attacker from directly reading the server responses (in the absence of any other weaknesses), but does not prevent the attacker from timing the responses to requests that the attacker issued cross domain.
CAPEC-541: Application Fingerprinting
An adversary engages in fingerprinting activities to determine the type or version of an application installed on a remote target.
CAPEC-580: System Footprinting
An adversary engages in active probing and exploration activities to determine security information about a remote target system. Often times adversaries will rely on remote applications that can be probed for system configurations.