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: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 6, 2026

Last Modified

September 29, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
Patch available.
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(6)

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

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibaprutil1t64 (1.6.3-1.1ubuntu7.1) @ noble2026-10-04ubuntu
redhatapr-util-0:1.6.1-9.el8_10.12026-09-21redhat
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 rangeFix by version rangeDependents
apr-util—
  • 1.2.0 up to 1.6.4-r0: fixed in 1.6.4-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util—
  • 1.2.0 up to 1.6.4-r0: fixed in 1.6.4-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util—
  • 1.2.0 up to 1.6.4-r0: fixed in 1.6.4-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util—
  • 1.2.0 up to 1.6.4-r0: fixed in 1.6.4-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util1.6.1-5 ... 1.6.4-2 (13 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util1.6.3-1
  • every version up to 1.6.3-1+deb12u1: fixed in 1.6.3-1+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util1.6.3-3
  • every version up to 1.6.3-3+deb13u1: fixed in 1.6.3-3+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util1.6.3-3, 1.6.3-4
  • every version up to 1.6.4-1: fixed in 1.6.4-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 28× in last 7d / 140× 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 276 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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 on August 6, 2026, with the most recent update on September 29, 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 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-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?
A fix for CVE-2025-49506 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-49506 are linked in the Vendor Advisories panel on this page.

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