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
Trending — 4 sources updated this weekElevated
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)
EPSS
54.8%
KEV
Not listed

Published

May 29, 2026

Last Modified

May 29, 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 20× in last 7d / 85× 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 144 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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. 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 54.8% 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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