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: 0.5%CVSS: 9.1Exploit: None knownExposed services: Not assessed

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
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100CISA 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
Severity91% × 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
0.5%
EPSS %ILE
37th
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

August 7, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
Patch available.
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(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
ubuntulibaprutil1-ldap (1.6.1-5ubuntu4.22.04.3) @ jammy2026-10-05ubuntu
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—
  • every version up to 1.6.4-r0: fixed in 1.6.4-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util—
  • every version up to 1.6.4-r0: fixed in 1.6.4-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util—
  • every version up to 1.6.4-r0: fixed in 1.6.4-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
apr-util—
  • every version 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 39× in last 7d / 264× 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 561 total refreshes for this CVE.

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

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

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 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 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-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?
A fix for CVE-2026-32327 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-32327 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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