Vulnerability-Lookup

CVE-2026-54147 (GCVE-0-2026-54147)

Vulnerability from cvelistv5 – Published: 2026-09-18 16:10 – Updated: 2026-09-18 17:28

Title

http4k: `DigestAuthProvider.verify` ignored configured algorithm and did not bind to request URI

Summary

http4k is a functional toolkit for Kotlin HTTP applications. Prior to 4.51.0.0, 5.42.0.0, and 6.50.0.0, DigestAuthProvider.verify in http4k-security-digest ignores its configured algorithm parameter and verifies every Digest response with hardcoded MD5. Deployments configured for SHA-256 therefore receive weaker MD5-based verification, exposing Digest authentication to collision-related attack paths that depend on the hash function's collision resistance. This issue is fixed in versions 4.51.0.0, 5.42.0.0, and 6.50.0.0.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 17:27 UTC

CWE

CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7637 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/http4k/http4k/security/advisor…	x_refsource_CONFIRM
https://github.com/http4k/http4k/commit/65d23d99f…	x_refsource_MISC
https://github.com/http4k/http4k/releases/tag/6.50.0.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
http4k	http4k	Affected: < 4.51.0.0 Affected: >= 5.0.0.0, < 5.42.0.0 Affected: >= 6.0.0.0, < 6.50.0.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54147

Vulnerability from fkie_nvd - Published: 2026-09-18 16:17 - Updated: 2026-09-24 21:25

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/http4k/http4k/commit/65d23d99fc5afbe34f29d8f61d0a003fbebb381c
	security-advisories@github.com	https://github.com/http4k/http4k/releases/tag/6.50.0.0
	security-advisories@github.com	https://github.com/http4k/http4k/security/advisories/GHSA-vxxm-wwqh-mh47

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "http4k",
          "vendor": "http4k",
          "versions": [
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GHSA-VXXM-WWQH-MH47

Vulnerability from github – Published: 2026-08-17 21:56 – Updated: 2026-08-17 21:57

Summary

http4k: `DigestAuthProvider.verify` ignored configured algorithm and did not bind to request URI

Details

Impact

An issue in DigestAuthProvider.verify:

Algorithm silently forced to MD5. The configured algorithm parameter was ignored — every verification used MD5 regardless of configuration. Deployments believing they were running SHA-256 Digest auth were silently inheriting MD5's collision weaknesses, including documented attack paths against Digest schemes that rely on the hash being collision-resistant.

Who is affected: any application using http4k-security-digest for HTTP Digest authentication. The bug has been present since DigestAuthProvider was introduced (commit 8a52b615b1, 2021).

Patches

Line	Fixed in	Edition
v6.x (Community)	6.50.0.0	Community
v5.x (LTS)	5.42.0.0	Enterprise — contact enterprise@http4k.org (if Digest auth is present in your v5.x line)
v4.x (LTS)	4.51.0.0	Enterprise — contact enterprise@http4k.org (if Digest auth is present in your v4.x line)

The fix: - Hashes with the configured algorithm instead of hardcoded MD5.

Workarounds

For deployments that cannot upgrade immediately: - Algorithm gap: do not rely on algorithm configuration; assume MD5 is in use and treat the Digest credentials as low-trust.

References

Vulnerability first present: 8a52b615b1
Algorithm fix: 65d23d99fc
Fix release: v6.50.0.0
Background: RFC 7616 — HTTP Digest Access Authentication

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Show details on source website

JSON

To clipboard

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    "github_reviewed": true,
    "github_reviewed_at": "2026-08-17T21:56:58Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nAn issue in `DigestAuthProvider.verify`:\n\n **Algorithm silently forced to MD5.** The configured `algorithm` parameter was ignored \u2014 every verification used MD5 regardless of configuration. Deployments believing they were running SHA-256 Digest auth were silently inheriting MD5\u0027s collision weaknesses, including documented attack paths against Digest schemes that rely on the hash being collision-resistant.\n\n**Who is affected:** any application using `http4k-security-digest` for HTTP Digest authentication. The bug has been present since `DigestAuthProvider` was introduced (commit `8a52b615b1`, 2021).\n\n### Patches\n\n| Line | Fixed in | Edition |\n|------|----------|---------|\n| v6.x (Community) | **6.50.0.0** | Community |\n| v5.x (LTS) | **5.42.0.0** | Enterprise \u2014 contact [enterprise@http4k.org](mailto:enterprise@http4k.org) (if Digest auth is present in your v5.x line) |\n| v4.x (LTS) | **4.51.0.0** | Enterprise \u2014 contact [enterprise@http4k.org](mailto:enterprise@http4k.org) (if Digest auth is present in your v4.x line) |\n\nThe fix:\n- Hashes with the configured `algorithm` instead of hardcoded MD5.\n\n### Workarounds\n\nFor deployments that cannot upgrade immediately:\n- **Algorithm gap:** do not rely on `algorithm` configuration; assume MD5 is in use and treat the Digest credentials as low-trust.\n\n### References\n\n- Vulnerability first present: [`8a52b615b1`](https://github.com/http4k/http4k/commit/8a52b615b1)\n- Algorithm fix: [`65d23d99fc`](https://github.com/http4k/http4k/commit/65d23d99fc)\n- Fix release: [v6.50.0.0](https://github.com/http4k/http4k/releases/tag/6.50.0.0)\n- Background: [RFC 7616 \u2014 HTTP Digest Access Authentication](https://datatracker.ietf.org/doc/html/rfc7616)",
  "id": "GHSA-vxxm-wwqh-mh47",
  "modified": "2026-08-17T21:57:58Z",
  "published": "2026-08-17T21:56:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/http4k/http4k/security/advisories/GHSA-vxxm-wwqh-mh47"
    },
    {
      "type": "WEB",
      "url": "https://github.com/http4k/http4k/commit/65d23d99fc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/http4k/http4k"
    },
    {
      "type": "WEB",
      "url": "https://github.com/http4k/http4k/releases/tag/6.50.0.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "http4k: `DigestAuthProvider.verify` ignored configured algorithm and did not bind to request URI"
}

Sightings

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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.
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CVE-2026-54147 (GCVE-0-2026-54147)

FKIE_CVE-2026-54147

GHSA-VXXM-WWQH-MH47

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