CVE-2025-49506

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-06. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack particularly on platforms without crypt() such as  Windows, BeOS, NetWare, or Android.

Users are recommended to upgrade to version 1.6.4, which fixes this issue.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 7, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
No patch confirmed yet.
generic

oss-security - CVE-2025-49506: Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack

http://www.openwall.com/lists/oss-security/2026/08/06/8
generic
https://lists.apache.org/thread/2v8o3bj9pb7lfcr57bdnjg9xfkj04mg5

Vendor Advisories for CVE-2025-49506(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibaprutil1-ldap (1.6.1-4ubuntu2.2+esm1) @ focal2026-09-18ubuntu
redhatapr-util-0:1.6.1-23.el9_8.12026-09-10redhat
redhatapr-util-0:1.6.3-23.el10_2.12026-09-10redhat
redhatapr-util-main-1.6.5-1.hum12026-08-22redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
apr-util—1.6.4-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
apr-util—1.6.4-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
apr-util—1.6.4-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
apr-util—1.6.4-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
apr-util1.6.1-5 ... 1.6.4-2 (13 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
apr-util1.6.3-11.6.3-1+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
apr-util1.6.3-31.6.3-3+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
apr-util1.6.3-3, 1.6.3-41.6.4-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 35× in last 7d / 149× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 207 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-18 17:36 UTCVendor advisory
  4. 2026-09-18 17:36 UTCGHSA enrichment
  5. 2026-09-18 03:41 UTCEG score recompute
  6. 2026-09-18 03:41 UTCVendor advisory
  7. 2026-09-18 03:41 UTCGHSA enrichment
  8. 2026-09-17 19:29 UTCEPSS rescore
  9. 2026-09-17 15:16 UTCVendor advisory
  10. 2026-09-17 15:16 UTCGHSA enrichment
  11. 2026-09-17 00:59 UTCEG score recompute
  12. 2026-09-17 00:59 UTCVendor advisory
  13. 2026-09-17 00:59 UTCGHSA enrichment
  14. 2026-09-16 14:07 UTCEPSS rescore
  15. 2026-09-16 03:01 UTCVendor advisory
  16. 2026-09-16 03:01 UTCGHSA enrichment
  17. 2026-09-15 14:28 UTCEG score recompute
  18. 2026-09-15 14:28 UTCVendor advisory
  19. 2026-09-15 14:28 UTCGHSA enrichment
  20. 2026-09-15 03:09 UTCEPSS rescore
  21. 2026-09-15 01:11 UTCVendor advisory
  22. 2026-09-15 01:11 UTCGHSA enrichment
  23. 2026-09-14 10:57 UTCVendor advisory
  24. 2026-09-14 10:57 UTCGHSA enrichment
  25. 2026-09-13 22:33 UTCEG score recompute
Show 75 more
  1. 2026-09-13 22:33 UTCVendor advisory
  2. 2026-09-13 22:33 UTCGHSA enrichment
  3. 2026-09-13 10:08 UTCVendor advisory
  4. 2026-09-13 10:08 UTCGHSA enrichment
  5. 2026-09-12 21:42 UTCEG score recompute
  6. 2026-09-12 21:42 UTCVendor advisory
  7. 2026-09-12 21:42 UTCGHSA enrichment
  8. 2026-09-12 15:00 UTCEPSS rescore
  9. 2026-09-12 09:17 UTCVendor advisory
  10. 2026-09-12 09:17 UTCGHSA enrichment
  11. 2026-09-11 20:52 UTCEG score recompute
  12. 2026-09-11 20:52 UTCVendor advisory
  13. 2026-09-11 20:52 UTCGHSA enrichment
  14. 2026-09-11 14:52 UTCEPSS rescore
  15. 2026-09-11 09:36 UTCEPSS rescore
  16. 2026-09-11 08:11 UTCVendor advisory
  17. 2026-09-11 08:11 UTCGHSA enrichment
  18. 2026-09-10 19:46 UTCEG score recompute
  19. 2026-09-10 19:46 UTCVendor advisory
  20. 2026-09-10 19:46 UTCGHSA enrichment
  21. 2026-09-10 09:34 UTCEPSS rescore
  22. 2026-09-10 07:18 UTCVendor advisory
  23. 2026-09-10 07:18 UTCGHSA enrichment
  24. 2026-09-09 18:54 UTCVendor advisory
  25. 2026-09-09 18:53 UTCGHSA enrichment
  26. 2026-09-09 06:10 UTCEG score recompute
  27. 2026-09-09 06:10 UTCVendor advisory
  28. 2026-09-09 06:10 UTCGHSA enrichment
  29. 2026-09-08 21:59 UTCEPSS rescore
  30. 2026-09-08 07:42 UTCVendor advisory
  31. 2026-09-08 07:42 UTCGHSA enrichment
  32. 2026-09-07 17:58 UTCEG score recompute
  33. 2026-09-07 17:58 UTCVendor advisory
  34. 2026-09-07 17:58 UTCGHSA enrichment
  35. 2026-09-07 16:00 UTCEPSS rescore
  36. 2026-09-07 16:00 UTCEPSS rescore
  37. 2026-09-06 17:17 UTCEG score recompute
  38. 2026-09-06 17:17 UTCVendor advisory
  39. 2026-09-06 17:17 UTCGHSA enrichment
  40. 2026-09-06 13:46 UTCEPSS rescore
  41. 2026-09-06 04:51 UTCVendor advisory
  42. 2026-09-06 04:51 UTCGHSA enrichment
  43. 2026-09-05 16:27 UTCEG score recompute
  44. 2026-09-05 16:27 UTCVendor advisory
  45. 2026-09-05 16:27 UTCGHSA enrichment
  46. 2026-09-05 15:28 UTCEPSS rescore
  47. 2026-09-05 03:33 UTCEG score recompute
  48. 2026-09-05 03:33 UTCVendor advisory
  49. 2026-09-05 03:33 UTCGHSA enrichment
  50. 2026-09-04 09:12 UTCEG score recompute
  51. 2026-09-04 09:12 UTCVendor advisory
  52. 2026-09-04 09:12 UTCGHSA enrichment
  53. 2026-09-04 05:06 UTCEPSS rescore
  54. 2026-09-03 19:12 UTCVendor advisory
  55. 2026-09-03 19:12 UTCGHSA enrichment
  56. 2026-09-03 06:16 UTCEG score recompute
  57. 2026-09-03 06:16 UTCVendor advisory
  58. 2026-09-03 06:16 UTCGHSA enrichment
  59. 2026-09-02 14:11 UTCEPSS rescore
  60. 2026-09-02 06:57 UTCVendor advisory
  61. 2026-09-02 06:57 UTCGHSA enrichment
  62. 2026-09-01 18:15 UTCEG score recompute
  63. 2026-09-01 18:15 UTCVendor advisory
  64. 2026-09-01 18:15 UTCGHSA enrichment
  65. 2026-09-01 13:53 UTCEPSS rescore
  66. 2026-08-31 22:36 UTCVendor advisory
  67. 2026-08-31 22:36 UTCGHSA enrichment
  68. 2026-08-30 23:56 UTCEG score recompute
  69. 2026-08-30 23:56 UTCVendor advisory
  70. 2026-08-30 23:56 UTCGHSA enrichment
  71. 2026-08-30 19:16 UTCEPSS rescore
  72. 2026-08-30 11:31 UTCEG score recompute
  73. 2026-08-30 11:31 UTCVendor advisory
  74. 2026-08-30 11:31 UTCGHSA enrichment
  75. 2026-08-30 01:21 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-49506?
CVE-2025-49506 is a high vulnerability published on August 6, 2026. APR-util versions 1.6.3 (and earlier) function aprpasswordvalidate() was not constant-time with regards to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack particularly on platforms without crypt() such as Windows, BeOS, NetWare, or Android. Users…
When was CVE-2025-49506 disclosed?
CVE-2025-49506 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-49506 actively exploited?
CVE-2025-49506 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.2% of all scored CVEs.
What is the CVSS score of CVE-2025-49506?
CVE-2025-49506 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-49506?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-49506, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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