CVE-2026-6324

MEDIUMNVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-05-29. NVD baseline CVSS 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 4.8Exploit: NoneExposed: 0

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

A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the soup_body_input_stream_read_chunked() function by sending a malicious HTTP request. This vulnerability occurs when libsoup operates behind a non-libsoup proxy server or as a proxy in front of a non-libsoup backend server. Successful exploitation can allow an attacker to bypass security controls, poison web caches, or gain unauthorized access.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity48% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
55.1%
KEV
Not listed

Published

May 29, 2026

Last Modified

July 21, 2026

Advisory Details (3)

Auto-updated May 29, 2026
🔬 Proof of concept available. Patch available. Sources: redhat.
generic🟡 PoC Available

(CVE-2026-6324) (#YWH-PGM9867-181) HTTP Request Smuggling on libsoup through libsoup/http1/soup-body-input-stream.c:soup_body_input_stream_read_chunked() via Unsigned to Signed Conversion Error in chunk size (#508) · Issues · GNOME / libsoup · GitLab

https://gitlab.gnome.org/GNOME/libsoup/-/issues/508
redhat

2458479 – (CVE-2026-6324) CVE-2026-6324 libsoup: libsoup: HTTP Request Smuggling via Unsigned to Signed Conversion Error

https://bugzilla.redhat.com/show_bug.cgi?id=2458479
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-6324

Vendor Advisories for CVE-2026-6324(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 67× 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 123 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-6324?
CVE-2026-6324 is a medium vulnerability published on May 29, 2026. A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the soupbodyinputstreamread_chunked() function by sending a malicious HTTP request. This vulnerability occurs when libsoup operates behind a non-libsoup proxy server or as a proxy in front of a…
When was CVE-2026-6324 disclosed?
CVE-2026-6324 was first published in the National Vulnerability Database on May 29, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6324 actively exploited?
CVE-2026-6324 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 55.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6324?
CVE-2026-6324 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-6324?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6324, 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.

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