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(CVE-2026-26958)
Vulnerability from cleanstart – Published: 2026-09-01 11:17 – Updated: 2026-09-18 11:59 – Source website
Withdrawn 2026-09-18
VLAI
Summary
Security fixes in tkn 0.43.2-r1
Details
Package tkn version 0.43.2-r1 fixes 59 vulnerabilities: CVE-2026-26958, CVE-2025-15558, CVE-2026-34040, CVE-2026-33997, CVE-2025-69725...
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"package": {
"ecosystem": "CleanStart",
"name": "tkn"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.43.2-r1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.43.2-r1"
]
}
],
"credits": [],
"database_specific": {},
"details": "Package tkn version 0.43.2-r1 fixes 59 vulnerabilities: CVE-2026-26958, CVE-2025-15558, CVE-2026-34040, CVE-2026-33997, CVE-2025-69725...",
"id": "CLEANSTART-2026-LC64978",
"modified": "2026-09-18T11:59:01.768079Z",
"published": "2026-09-01T11:17:16Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tektoncd/cli"
}
],
"related": [],
"schema_version": "1.7.3",
"summary": "Security fixes in tkn 0.43.2-r1",
"upstream": [
"CVE-2026-26958",
"CVE-2025-15558",
"CVE-2026-34040",
"CVE-2026-33997",
"CVE-2025-69725",
"ghsa-gcjh-h69q-9w9g",
"ghsa-pmwq-pjrm-6p5r",
"CVE-2026-49478",
"CVE-2026-22772",
"CVE-2026-48702",
"CVE-2026-23831",
"CVE-2026-24117",
"CVE-2026-24137",
"CVE-2026-54787",
"CVE-2026-49834",
"CVE-2026-49835",
"CVE-2026-39984",
"CVE-2026-24686",
"CVE-2026-23991",
"CVE-2026-23992",
"CVE-2026-2303",
"CVE-2026-29181",
"CVE-2026-39883",
"CVE-2026-46597",
"CVE-2026-39828",
"CVE-2026-39829",
"CVE-2026-39830",
"CVE-2026-39831",
"CVE-2026-39832",
"CVE-2026-39835",
"CVE-2026-42508",
"CVE-2026-46595",
"CVE-2026-39827",
"CVE-2026-39833",
"CVE-2026-39834",
"CVE-2026-46598",
"CVE-2026-27136",
"CVE-2026-25681",
"CVE-2026-33814",
"CVE-2026-39821",
"CVE-2026-46600",
"CVE-2026-25680",
"CVE-2026-42502",
"CVE-2026-42506",
"CVE-2026-39824",
"CVE-2026-56852",
"ghsa-hrxh-6v49-42gf",
"CVE-2026-33818",
"CVE-2026-56853",
"CVE-2026-56858",
"CVE-2026-56859",
"CVE-2026-56860",
"CVE-2026-56862",
"CVE-2026-56864",
"CVE-2026-56865",
"ghsa-259r-337f-4rfw",
"ghsa-3fxj-6jh8-hvhx",
"ghsa-9g5q-2w5x-hmxf",
"ghsa-rjr7-jggh-pgcp"
],
"withdrawn": "2026-09-18T11:59:01.768079Z"
}
CVE-2026-49478 (GCVE-0-2026-49478)
Vulnerability from cvelistv5 – Published: 2026-08-13 13:08 – Updated: 2026-08-15 03:14
VLAI
EPSS
VEX
Title
Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage
Summary
Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Versions through 1.8.5 improperly follow cross-host redirects and attach Kubernetes ServiceAccount tokens during OIDC discovery, allowing a malicious or compromised issuer to perform blind SSRF, substitute and cache malicious JWKS keys, or disclose ServiceAccount tokens to external hosts. Version 1.8.6 blocks cross-host redirects, restricts token injection, and restricts local token loading. No known workarounds are available.
Severity
8.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-15 03:14 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/sigstore/fulcio/security/advis… | x_refsource_CONFIRM |
| https://github.com/sigstore/fulcio/pull/2354 | x_refsource_MISC |
| https://github.com/sigstore/fulcio/commit/378c654… | x_refsource_MISC |
| https://github.com/sigstore/fulcio/releases/tag/v1.8.6 | x_refsource_MISC |
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CVE-2026-49834 (GCVE-0-2026-49834)
Vulnerability from cvelistv5 – Published: 2026-07-17 19:20 – Updated: 2026-07-17 19:42
VLAI
EPSS
VEX
Title
sigstore-go: Multi-log threshold bypass via single compromised log
Summary
sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.0, a verifier configured with WithTransparencyLog(N>1) or WithSignedCertificateTimestamps(N>1) counts verified witnesses per entry or per validation path rather than per log authority, allowing a single compromised transparency log or CT log to satisfy multi-log threshold requirements and defeat the multi-log policy. This issue is fixed in version 1.2.0.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 19:42 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/sigstore/sigstore-go/security/… | x_refsource_CONFIRM |
| https://github.com/sigstore/sigstore-go/pull/633 | x_refsource_MISC |
| https://github.com/sigstore/sigstore-go/commit/db… | x_refsource_MISC |
| https://github.com/sigstore/sigstore-go/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sigstore | sigstore-go |
Affected:
< 1.2.0
|
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CVE-2026-49835 (GCVE-0-2026-49835)
Vulnerability from cvelistv5 – Published: 2026-07-17 18:16 – Updated: 2026-07-17 19:45
VLAI
EPSS
VEX
Title
Sigstore Timestamp Authority: OOM due to unbounded metric label cardinality
Summary
Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.1.0, the global wrapMetrics middleware records raw HTTP request path r.URL.Path and raw HTTP request method r.Method as Prometheus labels for latency and request count metric vectors before routing, allowing an unauthenticated remote attacker to issue requests with random paths such as /api/v1/timestamp/<uuid> or random HTTP methods and create unbounded permanent time-series entries that exhaust memory. This issue is fixed in version 2.1.0.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 19:45 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/sigstore/timestamp-authority/s… | x_refsource_CONFIRM |
| https://github.com/sigstore/timestamp-authority/c… | x_refsource_MISC |
| https://github.com/sigstore/timestamp-authority/r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sigstore | timestamp-authority |
Affected:
< 2.1.0
|
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CVE-2026-54787 (GCVE-0-2026-54787)
Vulnerability from cvelistv5 – Published: 2026-07-31 21:58 – Updated: 2026-07-31 23:36
VLAI
EPSS
VEX
Title
sigstore-go fails to check signature timestamps against a signing key's validity period
Summary
sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 23:35 UTC
CWE
- CWE-324 - Use of a Key Past its Expiration Date
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/sigstore/sigstore-go/security/… | x_refsource_CONFIRM |
| https://github.com/sigstore/sigstore-go/pull/642 | x_refsource_MISC |
| https://github.com/sigstore/sigstore-go/commit/45… | x_refsource_MISC |
| https://github.com/sigstore/sigstore-go/releases/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sigstore | sigstore-go |
Affected:
< 1.2.1
|
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"value": "sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1."
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CVE-2026-56852 (GCVE-0-2026-56852)
Vulnerability from cvelistv5 – Published: 2026-07-21 19:18 – Updated: 2026-08-10 22:57
VLAI
EPSS
VEX
Title
Infinite loop on invalid input in golang.org/x/text
Summary
A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 13:26 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| golang.org/x/text | golang.org/x/text/unicode/norm |
Affected:
0 , < 0.39.0
(semver)
|
Credits
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CVE-2026-56853 (GCVE-0-2026-56853)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:23
VLAI
EPSS
VEX
Title
Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http
Summary
When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:22 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | net/http |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
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CVE-2026-56858 (GCVE-0-2026-56858)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:32
VLAI
EPSS
VEX
Title
Fix Javascript regexp context tracking in html/template
Summary
Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:31 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | html/template |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
Credits
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CVE-2026-56859 (GCVE-0-2026-56859)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:21
VLAI
EPSS
VEX
Title
Add recursion depth guard during decode in encoding/xml
Summary
Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:21 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | encoding/xml |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
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"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/issue/80481"
},
{
"url": "https://go.dev/cl/803320"
},
{
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-6088"
}
],
"title": "Add recursion depth guard during decode in encoding/xml"
}
},
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"assignerShortName": "Go",
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"datePublished": "2026-08-13T21:58:52.959Z",
"dateReserved": "2026-06-23T15:10:49.353Z",
"dateUpdated": "2026-08-14T15:21:46.218Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-56860 (GCVE-0-2026-56860)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 16:14
VLAI
EPSS
VEX
Title
Avoid quadratic complexity in resolvePath in net/url
Summary
Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:14 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | net/url |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
{
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"attackVector": "NETWORK",
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"baseScore": 5.9,
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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}
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}
],
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"timestamp": "2026-08-14T16:14:34.601382Z",
"version": "2.0.3"
},
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"cweId": "CWE-407",
"description": "CWE-407 Inefficient Algorithmic Complexity",
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}
],
"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "net/url",
"product": "net/url",
"programRoutines": [
{
"name": "resolvePath"
},
{
"name": "URL.Parse"
},
{
"name": "URL.ResolveReference"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.25.13",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "1.26.6",
"status": "affected",
"version": "1.26.0-0",
"versionType": "semver"
},
{
"lessThan": "1.27.0-rc.3",
"status": "affected",
"version": "1.27.0-0",
"versionType": "semver"
}
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],
"descriptions": [
{
"lang": "en",
"value": "Previously, resolving relative paths containing parent directory (\u0027..\u0027) segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for \u0027..\u0027 segments, eliminating the quadratic time complexity and significantly reducing memory allocations."
}
],
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"description": "CWE-407: Inefficient Algorithmic Complexity",
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],
"providerMetadata": {
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"url": "https://go.dev/cl/803681"
},
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"url": "https://go.dev/issue/80494"
},
{
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-6218"
}
],
"title": "Avoid quadratic complexity in resolvePath in net/url"
}
},
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},
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"dataVersion": "5.2"
}
CVE-2026-56862 (GCVE-0-2026-56862)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:29
VLAI
EPSS
VEX
Title
Limit handshake messages we are willing to accept post-handshake in crypto/tls
Summary
Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:27 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | crypto/tls |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
Credits
{
"containers": {
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"metrics": [
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
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"userInteraction": "NONE",
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"version": "2.0.3"
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}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T15:29:41.741Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"title": "CISA ADP Vulnrichment"
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],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "crypto/tls",
"product": "crypto/tls",
"programRoutines": [
{
"name": "Conn.readRecordOrCCS"
},
{
"name": "Conn.Handshake"
},
{
"name": "Conn.HandshakeContext"
},
{
"name": "Conn.Read"
},
{
"name": "Conn.Write"
},
{
"name": "Dial"
},
{
"name": "DialWithDialer"
},
{
"name": "Dialer.Dial"
},
{
"name": "Dialer.DialContext"
},
{
"name": "QUICConn.HandleData"
},
{
"name": "QUICConn.Start"
}
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}
]
}
],
"credits": [
{
"lang": "en",
"value": "Qi Deng of Aurascape.ai"
}
],
"descriptions": [
{
"lang": "en",
"value": "Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely."
}
],
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{
"descriptions": [
{
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en"
}
]
}
],
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},
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"url": "https://pkg.go.dev/vuln/GO-2026-6090"
}
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}
},
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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