CVE-2026-32327

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-06. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

A bug in APR-util version 1.6.3 (and earlier) allows a stack recursion attack against any library consumer which parses XML from untrusted sources and uses the apr_xml_quote_elem() function.

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

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 7, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-32327: Apache Portable Runtime Utility: apr-util XML stack recursion crash

http://www.openwall.com/lists/oss-security/2026/08/06/9
generic
https://lists.apache.org/thread/hq27vj8yfno9tkwv0fpj6jksfzgxvth1

Vendor Advisories for CVE-2026-32327(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 (1.5.4-1ubuntu0.1~esm1) @ xenial2026-09-19ubuntu
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 82× in last 7d / 333× 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 452 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-32327?
CVE-2026-32327 is a critical vulnerability published on August 6, 2026. A bug in APR-util version 1.6.3 (and earlier) allows a stack recursion attack against any library consumer which parses XML from untrusted sources and uses the aprxmlquote_elem() function. Users are recommended to upgrade to version 1.6.4, which fixes this issue.
When was CVE-2026-32327 disclosed?
CVE-2026-32327 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-2026-32327 actively exploited?
CVE-2026-32327 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 61.0% of all scored CVEs.
What is the CVSS score of CVE-2026-32327?
CVE-2026-32327 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-32327?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-32327, 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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