CWE-208
Observable Timing Discrepancy
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.
CVE-2026-41418 (GCVE-0-2026-41418)
Vulnerability from cvelistv5 – Published: 2026-04-24 18:49 – Updated: 2026-04-24 19:59
VLAI
Title
4ga Boards: User Enumeration via Timing Side-Channel in Authentication Endpoint
Summary
4ga Boards is a boards system for realtime project management. Prior to 3.3.5, 4ga Boards is vulnerable to user enumeration via a timing side-channel in the login endpoint (POST /api/access-tokens). When an invalid username/email is provided, the server responds immediately (~17ms average). When a valid username/email is provided with an incorrect password, the server first performs a bcrypt.compareSync() operation (~74ms average) before responding. This ~4.4× timing difference is trivially detectable even over a network — a single request suffices. This vulnerability is fixed in 3.3.5.
Severity
5.3 (Medium)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/RARgames/4gaBoards/security/ad… | x_refsource_CONFIRM |
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CVE-2026-41588 (GCVE-0-2026-41588)
Vulnerability from cvelistv5 – Published: 2026-05-08 14:51 – Updated: 2026-05-08 23:27
VLAI
Title
RELATE: Timing Attack Vulnerability in course/auth.py — check_sign_in_key()
Summary
RELATE is a web-based courseware package. Prior to commit 2f68e16, there is a timing attack vulnerability in course/auth.py — check_sign_in_key(). This issue has been patched via commit 2f68e16.
Severity
9 (Critical)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/inducer/relate/security/adviso… | x_refsource_CONFIRM |
| https://github.com/inducer/relate/commit/2f68e16c… | x_refsource_MISC |
Impacted products
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CVE-2026-42602 (GCVE-0-2026-42602)
Vulnerability from cvelistv5 – Published: 2026-05-13 20:12 – Updated: 2026-05-14 12:52
VLAI
Title
azureauthextension Authenticate method does not validate bearer tokens, allowing auth bypass via replay
Summary
azureauthextension is the Azure Authenticator Extension. From 0.124.0 to 0.150.0, a server-side authentication bypass in azureauthextension allows any party who holds a single valid Azure access token for any scope the collector's configured identity can mint for to authenticate to any OpenTelemetry receiver that uses auth: azure_auth. The extension's Authenticate method does not validate incoming bearer tokens as JWTs. Instead, it calls its own configured credential to obtain an access token and compares the client's token to the result with string equality — and the scope for that server-side token request is taken from the client-supplied Host header. As a result, a token minted for any Azure resource the service principal has ever been issued a token for (ARM, Graph, Key Vault, Storage, etc.) will authenticate to the collector if the attacker picks a matching Host. Tokens are replayable for the full issued lifetime (commonly several hours for managed identity tokens).
Severity
8.1 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-collector-contrib |
Affected:
>= 0.124.0, <= 0.150.0
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CVE-2026-43514 (GCVE-0-2026-43514)
Vulnerability from cvelistv5 – Published: 2026-05-12 15:32 – Updated: 2026-05-13 17:22
VLAI
Title
Apache Tomcat: AJP secret compared in non-constant time
Summary
Observable Timing Discrepancy vulnerability when comparing AJP secret in Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.
Older unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.
Severity
No CVSS data available.
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/2k654v5cq123npfsd… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
Affected:
11.0.0-M1 , ≤ 11.0.21
(semver)
Affected: 10.1.0-M1 , ≤ 10.1.54 (semver) Affected: 9.0.0.M1 , ≤ 9.0.117 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Affected: 7.0.0 , ≤ 7.0.109 (semver) Unknown: 0 , < 7.00 (semver) |
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CVE-2026-44061 (GCVE-0-2026-44061)
Vulnerability from cvelistv5 – Published: 2026-05-21 07:34 – Updated: 2026-05-21 12:46
VLAI
Title
DES-ECB auth with timing side channel
Summary
Netatalk 1.5.0 through 4.4.2 uses DES-ECB for authentication with a timing side channel, which allows a remote attacker to recover authentication credentials via timing analysis.
Severity
5.9 (Medium)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://netatalk.io/security/CVE-2026-44061 | vendor-advisory |
Impacted products
Date Public
2026-05-13 00:00
Credits
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CVE-2026-44368 (GCVE-0-2026-44368)
Vulnerability from cvelistv5 – Published: 2026-05-13 20:18 – Updated: 2026-05-15 18:44
VLAI
Title
PyQuorum: Timing side‑channel in mul_mod
Summary
PyQuorum is a cryptographic library for secret sharing and key management. Prior to 0.2.1, the mul_mod function implements multiplication via a binary expansion loop whose execution time depends on the Hamming weight of the second operand (the exponent). An attacker who can measure the time of secret‑sharing operations (e.g., via a remote service) could progressively recover the values of shares, ultimately leading to secret reconstruction. This vulnerability is fixed in 0.2.1.
Severity
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/svvqt/pyquorum/security/adviso… | x_refsource_CONFIRM |
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CVE-2026-45410 (GCVE-0-2026-45410)
Vulnerability from cvelistv5 – Published: 2026-05-28 21:23 – Updated: 2026-05-29 14:46
VLAI
Title
Time-based user enumeration in TREK authentication endpoint
Summary
TREK is a collaborative travel planner. Prior to 3.0.18, early return on missing user during login flow allowed an attacker to enumerate valid user accounts via response timing discrepancy. When an email address existed in the database, the backend performed a bcrypt password comparison before returning a 401 Unauthorized, adding ~370 ms of latency. When the email did not exist, the backend returned immediately (~10 ms). This ~14× timing difference could be detected without any difference in HTTP status codes or response bodies. This vulnerability is fixed in 3.0.18.
Severity
5.3 (Medium)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/mauriceboe/TREK/security/advis… | x_refsource_CONFIRM |
| https://gist.github.com/jubnl/c2402adf85d946c1730… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mauriceboe | TREK |
Affected:
< 3.0.18
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CVE-2026-47373 (GCVE-0-2026-47373)
Vulnerability from cvelistv5 – Published: 2026-05-20 20:25 – Updated: 2026-05-21 14:10
VLAI
Title
Crypt::SaltedHash versions through 0.09 for Perl is susceptible to timing attacks
Summary
Crypt::SaltedHash versions through 0.09 for Perl is susceptible to timing attacks.
These versions use Perl's built-in eq comparison. Discrepencies in timing could be used to guess the underlying hash.
Severity
7.5 (High)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://metacpan.org/release/RRWO/Crypt-SaltedHas… | release-notes |
| https://github.com/robrwo/perl-Crypt-SaltedHash/c… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RRWO | Crypt::SaltedHash |
Affected:
0 , ≤ 0.09
(custom)
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CVE-2026-47783 (GCVE-0-2026-47783)
Vulnerability from cvelistv5 – Published: 2026-05-20 05:43 – Updated: 2026-05-20 12:49
VLAI
Summary
In memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a loop exits as soon as a valid username is found by sasl_server_userdb_checkpass.
Severity
8.1 (High)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
Impacted products
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CVE-2026-47784 (GCVE-0-2026-47784)
Vulnerability from cvelistv5 – Published: 2026-05-20 05:45 – Updated: 2026-05-20 12:21
VLAI
Summary
In memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.
Severity
8.1 (High)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
Impacted products
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{
"nodes": [
{
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],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
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"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"version": "3.1"
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"descriptions": [
{
"cweId": "CWE-208",
"description": "CWE-208 Observable Timing Discrepancy",
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"providerMetadata": {
"dateUpdated": "2026-05-20T05:45:37.864Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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"references": [
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"url": "https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed"
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{
"url": "https://github.com/memcached/memcached/compare/1.6.41...1.6.42"
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{
"url": "https://github.com/memcached/memcached/wiki/ReleaseNotes1642"
}
],
"x_generator": {
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"cveMetadata": {
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"cveId": "CVE-2026-47784",
"datePublished": "2026-05-20T05:45:37.864Z",
"dateReserved": "2026-05-20T05:45:37.209Z",
"dateUpdated": "2026-05-20T12:21:02.894Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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.