CVE-2026-15714

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-14. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

An out-of-bounds read vulnerability was found in libsoup's multipart processing subsystem. The flaw exists in the soup_multipart_input_stream_read_headers() function inside soup-multipart-input-stream.c, which does not adequately restrict or validate the size of incoming multipart boundary strings. When processing a crafted HTTP response containing a malformed or oversized boundary parameter, the internal stream reader reads past the allocated buffer bounds. A remote, unauthenticated attacker can exploit this behavior to cause a service denial (DoS) through application failure or potentially read fragments of unauthorized memory metadata.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
60(Attend)
EG Risk 60/100SSVC: Attend

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
Severity65% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: redhat.
generic🟡 PoC Available

(#YWH-PGM9867-220) OOB Read on SoupSession through soup_multipart_input_stream_read_headers() in libsoup/soup-multipart-input-stream.c via large Multipart Boundary String (#542) · Issues · GNOME / libsoup · GitLab

https://gitlab.gnome.org/GNOME/libsoup/-/work_items/542
redhat

2499942 – (CVE-2026-15714) CVE-2026-15714 libsoup: SoupMultipartInputStream: libsoup: Out-of-bounds read in soup_multipart_input_stream_read_headers via an oversized multipart boundary string

https://bugzilla.redhat.com/show_bug.cgi?id=2499942
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-15714

Vendor Advisories for CVE-2026-15714(2)

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

Affected Packages

(6 across 4 ecosystems)
Debian:12(2)
PackageVulnerable rangeFixed inDependents
libsoup2.42.74.3-1 ... 2.74.3-9 (16 versions)——
libsoup33.2.2-2 ... 3.6.6-1 (35 versions)——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
libsoup2.42.74.3-10.1, 2.74.3-11——
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)——
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libsoup2.42.72.0-2 ... 2.74.3-9 (28 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 82× 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 113 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15714?
CVE-2026-15714 is a medium vulnerability published on July 14, 2026. An out-of-bounds read vulnerability was found in libsoup's multipart processing subsystem. The flaw exists in the soupmultipartinputstreamread_headers() function inside soup-multipart-input-stream.c, which does not adequately restrict or validate the size of incoming multipart boundary strings.…
When was CVE-2026-15714 disclosed?
CVE-2026-15714 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15714 actively exploited?
CVE-2026-15714 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.5% of all scored CVEs.
What is the CVSS score of CVE-2026-15714?
CVE-2026-15714 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-15714?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15714, 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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