Common Weakness Enumeration

CWE-208

Allowed

Observable Timing Discrepancy

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

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.

306 vulnerabilities reference this CWE, most recent first.

CVE-2019-13420 (GCVE-0-2019-13420)

Vulnerability from cvelistv5 – Published: 2019-08-13 14:25 – Updated: 2024-08-04 23:49
VLAI
Summary
Search Guard versions before 21.0 had an timing side channel issue when using the internal user database.
Severity
No CVSS data available.
CWE
  • CWE-208 - Information Exposure Through Timing Discrepancy
Assigner
References
Impacted products
Vendor Product Version
floragunn Search Guard Affected: unspecified , < 21.0 (custom)
Create a notification for this product.
Show details on NVD website
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CVE-2019-9494 (GCVE-0-2019-9494)

Vulnerability from cvelistv5 – Published: 2019-04-17 13:31 – Updated: 2024-08-04 21:54
VLAI
Title
The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side-channel attacks
Summary
The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. An attacker may be able to gain leaked information from a side channel attack that can be used for full password recovery. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.
Severity
No CVSS data available.
CWE
  • CWE-208 - Information Exposure Through Timing Discrepancy
  • CWE-524 - Information Exposure Through Caching
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2017-20240 (GCVE-0-2017-20240)

Vulnerability from cvelistv5 – Published: 2026-06-12 13:19 – Updated: 2026-06-12 16:59
VLAI
Title
Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks
Summary
Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks. These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-208 - Observable Timing Discrepancy
Assigner
References
Impacted products
Vendor Product Version
ARODLAND Crypt::PBKDF2 Affected: 0 , < 0.261630 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2016-15015 (GCVE-0-2016-15015)

Vulnerability from cvelistv5 – Published: 2023-01-08 17:15 – Updated: 2024-08-06 03:47
VLAI
Title
viafintech Barzahlen Payment Module PHP SDK Webhook.php verify timing discrepancy
Summary
A vulnerability, which was classified as problematic, was found in viafintech Barzahlen Payment Module PHP SDK up to 2.0.0. Affected is the function verify of the file src/Webhook.php. The manipulation leads to observable timing discrepancy. The complexity of an attack is rather high. The exploitability is told to be difficult. Upgrading to version 2.0.1 is able to address this issue. The patch is identified as 3e7d29dc0ca6c054a6d6e211f32dae89078594c1. It is recommended to upgrade the affected component. VDB-217650 is the identifier assigned to this vulnerability.
Severity
2.6 (Low)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.6 (Low)
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-208 - Observable Timing Discrepancy
Assigner
References
Impacted products
Credits
VulDB GitHub Commit Analyzer
Show details on NVD website
To clipboard 

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CVE-2016-10535 (GCVE-0-2016-10535)

Vulnerability from cvelistv5 – Published: 2018-05-31 20:00 – Updated: 2024-09-17 01:30
VLAI
Summary
csrf-lite is a cross-site request forgery protection library for framework-less node sites. csrf-lite uses `===`, a fail first string comparison, instead of a time constant string comparison This enables an attacker to guess the secret in no more than (16*18)288 guesses, instead of the 16^18 guesses required were the timing attack not present.
Severity
No CVSS data available.
CWE
  • CWE-208 - Information Exposure Through Timing Discrepancy (CWE-208)
Assigner
References
Impacted products
Date Public
2018-04-26 00:00
Show details on NVD website
To clipboard 

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CVE-2014-125056 (GCVE-0-2014-125056)

Vulnerability from cvelistv5 – Published: 2023-01-07 09:06 – Updated: 2024-08-06 14:10
VLAI
Title
Pylons horus services.py timing discrepancy
Summary
A vulnerability was found in Pylons horus and classified as problematic. Affected by this issue is some unknown functionality of the file horus/flows/local/services.py. The manipulation leads to observable timing discrepancy. The complexity of an attack is rather high. The exploitation is known to be difficult. The patch is identified as fd56ccb62ce3cbdab0484fe4f9c25c4eda6c57ec. It is recommended to apply a patch to fix this issue. VDB-217598 is the identifier assigned to this vulnerability.
Severity
2.6 (Low)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.6 (Low)
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-208 - Observable Timing Discrepancy
Assigner
References
URL Tags
https://vuldb.com/?id.217598 vdb-entrytechnical-description
https://vuldb.com/?ctiid.217598 signaturepermissions-required
https://github.com/Pylons/horus/commit/fd56ccb62c… patch
Impacted products
Vendor Product Version
Pylons horus Affected: n/a
Create a notification for this product.
Credits
VulDB GitHub Commit Analyzer
Show details on NVD website
To clipboard 

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CVE-2014-125055 (GCVE-0-2014-125055)

Vulnerability from cvelistv5 – Published: 2023-01-07 08:59 – Updated: 2024-08-06 14:10
VLAI
Title
agnivade easy-scrypt scrypt.go VerifyPassphrase timing discrepancy
Summary
A vulnerability, which was classified as problematic, was found in agnivade easy-scrypt. Affected is the function VerifyPassphrase of the file scrypt.go. The manipulation leads to observable timing discrepancy. The complexity of an attack is rather high. The exploitability is told to be difficult. Upgrading to version 1.0.0 is able to address this issue. The name of the patch is 477c10cf3b144ddf96526aa09f5fdea613f21812. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-217596.
Severity
2.6 (Low)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.6 (Low)
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-208 - Observable Timing Discrepancy
Assigner
References
Impacted products
Credits
VulDB GitHub Commit Analyzer
Show details on NVD website
To clipboard 

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CVE-2013-10006 (GCVE-0-2013-10006)

Vulnerability from cvelistv5 – Published: 2023-01-01 16:30 – Updated: 2025-04-10 17:32
VLAI
Title
Ziftr primecoin bitcoinrpc.cpp HTTPAuthorized timing discrepancy
Summary
A vulnerability classified as problematic was found in Ziftr primecoin up to 0.8.4rc1. Affected by this vulnerability is the function HTTPAuthorized of the file src/bitcoinrpc.cpp. The manipulation of the argument strUserPass/strRPCUserColonPass leads to observable timing discrepancy. The complexity of an attack is rather high. The exploitation appears to be difficult. Upgrading to version 0.8.4rc2 is able to address this issue. The patch is named cdb3441b5cd2c1bae49fae671dc4a496f7c96322. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-217171.
Severity
2.6 (Low)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.6 (Low)
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-208 - Observable Timing Discrepancy
Assigner
References
Impacted products
Vendor Product Version
Ziftr primecoin Affected: 0.8.4rc1
Create a notification for this product.
Credits
VulDB GitHub Commit Analyzer
Show details on NVD website
To clipboard 

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CVE-2010-10006 (GCVE-0-2010-10006)

Vulnerability from cvelistv5 – Published: 2023-01-17 23:58 – Updated: 2025-04-03 19:25
VLAI
Title
michaelliao jopenid OpenIdManager.java getAuthentication timing discrepancy
Summary
A vulnerability, which was classified as problematic, was found in michaelliao jopenid. Affected is the function getAuthentication of the file JOpenId/src/org/expressme/openid/OpenIdManager.java. The manipulation leads to observable timing discrepancy. The complexity of an attack is rather high. The exploitability is told to be difficult. Upgrading to version 1.08 is able to address this issue. The name of the patch is c9baaa976b684637f0d5a50268e91846a7a719ab. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-218460.
Severity
2.6 (Low)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.6 (Low)
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-208 - Observable Timing Discrepancy
  • CWE-203 - Observable Discrepancy
Assigner
References
Impacted products
Credits
VulDB GitHub Commit Analyzer
Show details on NVD website
To clipboard 

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    "cveId": "CVE-2010-10006",
    "datePublished": "2023-01-17T23:58:07.307Z",
    "dateReserved": "2023-01-16T22:58:58.732Z",
    "dateUpdated": "2025-04-03T19:25:38.582Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-26F5-8H2X-34XH

Vulnerability from github – Published: 2026-03-18 16:17 – Updated: 2026-03-20 21:27
VLAI
Summary
h3 has an observable timing discrepancy in basic auth utils
Details

Summary

A Timing Side-Channel vulnerability exists in the requireBasicAuth function due to the use of unsafe string comparison (!==). This allows an attacker to deduce the valid password character-by-character by measuring the server's response time, effectively bypassing password complexity protections.

Details

The vulnerability is located in the requireBasicAuth function. The code performs a standard string comparison between the user-provided password and the expected password:

if (opts.password && password !== opts.password) {
  throw autheFailed(event, opts?.realm);
}

In V8 (and most runtime environments), the !== operator is optimized to "fail fast." It stops execution and returns false as soon as it encounters the first mismatched byte. * If the first character is wrong, it returns immediately. * If the first character is correct but the second is wrong, it takes slightly longer.

By statistically analyzing these minute timing differences over many requests, an attacker can determine the correct password one character at a time.

PoC

This vulnerability is exploitable in real-world scenarios without direct access to the server machine.

To reproduce this, an attacker can send two packets (or bursts of packets) at the exact same time: 1. Packet A: Contains a password that is known to be incorrect starting at the first character (e.g., AAAA...). 2. Packet B: Contains a password where the first character is a guess (e.g., B...).

By measuring the time-to-first-byte (TTFB) or total response time of these concurrent requests, the attacker can filter out network jitter. If Packet B takes consistently longer to return than Packet A, the first character is confirmed as correct. This process is repeated for the second character, and so on. Tests confirm this timing difference is statistically consistent enough to recover credentials remotely.

Impact

This vulnerability allows remote attackers to recover passwords. While network jitter makes this difficult over the internet, it is highly effective in local networks or cloud environments where the attacker is co-located. It reduces the complexity of cracking a password from exponential (guessing the whole string) to linear (guessing one char at a time).

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.0.0-rc.8"
      },
      "package": {
        "ecosystem": "npm",
        "name": "h3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0-beta.0"
            },
            {
              "fixed": "2.0.1-rc.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33129"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-208"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-18T16:17:58Z",
    "nvd_published_at": "2026-03-20T10:16:19Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nA Timing Side-Channel vulnerability exists in the `requireBasicAuth` function due to the use of unsafe string comparison (`!==`). This allows an attacker to deduce the valid password character-by-character by measuring the server\u0027s response time, effectively bypassing password complexity protections.\n\n### Details\nThe vulnerability is located in the `requireBasicAuth` function. The code performs a standard string comparison between the user-provided password and the expected password:\n\n~~~typescript\nif (opts.password \u0026\u0026 password !== opts.password) {\n  throw autheFailed(event, opts?.realm);\n}\n~~~\n\nIn V8 (and most runtime environments), the `!==` operator is optimized to \"fail fast.\" It stops execution and returns `false` as soon as it encounters the first mismatched byte.\n* If the first character is wrong, it returns immediately.\n* If the first character is correct but the second is wrong, it takes slightly longer.\n\nBy statistically analyzing these minute timing differences over many requests, an attacker can determine the correct password one character at a time.\n\n### PoC\nThis vulnerability is exploitable in real-world scenarios without direct access to the server machine.\n\nTo reproduce this, an attacker can send two packets (or bursts of packets) at the exact same time:\n1.  **Packet A:** Contains a password that is known to be incorrect starting at the first character (e.g., `AAAA...`).\n2.  **Packet B:** Contains a password where the first character is a guess (e.g., `B...`).\n\nBy measuring the time-to-first-byte (TTFB) or total response time of these concurrent requests, the attacker can filter out network jitter. If Packet B takes consistently longer to return than Packet A, the first character is confirmed as correct. This process is repeated for the second character, and so on. Tests confirm this timing difference is statistically consistent enough to recover credentials remotely.\n\n### Impact\n\nThis vulnerability allows remote attackers to recover passwords. While network jitter makes this difficult over the internet, it is highly effective in local networks or cloud environments where the attacker is co-located. It reduces the complexity of cracking a password from exponential (guessing the whole string) to linear (guessing one char at a time).",
  "id": "GHSA-26f5-8h2x-34xh",
  "modified": "2026-03-20T21:27:48Z",
  "published": "2026-03-18T16:17:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/h3js/h3/security/advisories/GHSA-26f5-8h2x-34xh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33129"
    },
    {
      "type": "WEB",
      "url": "https://github.com/h3js/h3/pull/1283"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/h3js/h3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/h3js/h3/releases/tag/v2.0.1-rc.9"
    }
  ],
  "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"
    }
  ],
  "summary": "h3 has an observable timing discrepancy in basic auth utils"
}

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.

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