CVE-2026-49017

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently unresponsive with increasing CPU and memory consumption. An authenticated attacker can systematically exhaust all proxy-server workers, resulting in denial of service. The defect was introduced in Swift 2.36.0.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 24, 2026

Advisory Details (5)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic

oss-security - [OSSA-2026-014] OpenStack Swift: Errata 1 - Proxy-server denial of service via truncated s3api chunked upload, (CVE-2026-49017)

http://www.openwall.com/lists/oss-security/2026/06/02/6
generic

oss-security - [OSSA-2026-014] OpenStack Swift: Swift proxy-server denial of service via truncated s3api chunked upload (CVE-2026-49017)

http://www.openwall.com/lists/oss-security/2026/05/27/9
generic
https://review.opendev.org/c/openstack/swift/+/988093
generic
https://review.opendev.org/c/openstack/swift/+/987957
generic

Bug #2152205 “[OSSA-2026-014] Swift proxy-server denial of servi...” : Bugs : OpenStack Object Storage (swift)

https://bugs.launchpad.net/bugs/2152205

Vendor Advisories for CVE-2026-49017(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipswift—ghsa

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

(3 across 3 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
swift2.35.0-4, 2.35.1-0+deb13u12.35.1-0+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
swift2.35.0-4 ... 2.37.1-3 (15 versions)2.37.1-4—
PyPI(1)
PackageVulnerable rangeFixed inDependents
swift2.36.0, 2.36.1, 2.37.0, 2.37.1——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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 228 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-49017?
CVE-2026-49017 is a high vulnerability published on May 27, 2026. In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently…
When was CVE-2026-49017 disclosed?
CVE-2026-49017 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49017 actively exploited?
CVE-2026-49017 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 74.9% of all scored CVEs.
What is the CVSS score of CVE-2026-49017?
CVE-2026-49017 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-49017?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49017, 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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