CVE-2026-15714

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Elevated
6.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
6.5MEDIUMmedium confidence
EG Risk
60
EG Risk 60/100

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 (value × EchelonGraph’s weight)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
0.4%
EPSS %ILE
31st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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 public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
Patch available. Sources: redhat.
Web page

(#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
Red Hat

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
Red HatMentions a patch (unverified)

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 rangeFix by version rangeDependents
libsoup2.42.74.3-1 ... 2.74.3-9 (16 versions)
  • every version on: no fix on record
—
libsoup33.2.2-2 ... 3.6.6-1 (35 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.74.3-10.1, 2.74.3-11
  • every version on: no fix on record
—
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)
  • every version on: no fix on record
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.72.0-2 ... 2.74.3-9 (28 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 39× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 179 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 79 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-12 16:31 UTCEG score recompute
  4. 2026-10-11 20:09 UTCEG score recompute
  5. 2026-10-11 17:22 UTCEG score recompute
  6. 2026-10-11 14:55 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  17. 2026-10-01 12:52 UTCEG score recompute
  18. 2026-10-01 12:52 UTCVendor advisory
  19. 2026-10-01 12:52 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-09-28 08:53 UTCEG score recompute
  24. 2026-09-28 08:53 UTCVendor advisory
  25. 2026-09-28 08:53 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
Show 75 more
  1. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  2. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-09-24 09:00 UTCEG score recompute
  4. 2026-09-24 09:00 UTCVendor advisory
  5. 2026-09-24 09:00 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  6. 2026-09-23 03:28 UTCEG score recompute
  7. 2026-09-23 03:28 UTCVendor advisory
  8. 2026-09-23 03:28 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  9. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  10. 2026-09-18 04:51 UTCEG score recompute
  11. 2026-09-18 04:51 UTCVendor advisory
  12. 2026-09-18 04:51 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  13. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-09-14 05:40 UTCEG score recompute
  16. 2026-09-14 05:40 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  17. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-09-13 07:39 UTCEG score recompute
  19. 2026-09-13 07:39 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  20. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-09-11 21:54 UTCEG score recompute
  22. 2026-09-11 21:54 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  23. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  24. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  25. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  26. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  27. 2026-09-08 01:08 UTCEG score recompute
  28. 2026-09-08 01:08 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  29. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  30. 2026-09-06 18:59 UTCEG score recompute
  31. 2026-09-06 18:59 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  33. 2026-09-05 20:58 UTCEG score recompute
  34. 2026-09-05 20:58 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  35. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  36. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  37. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  38. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  39. 2026-08-31 02:21 UTCEG score recompute
  40. 2026-08-31 02:21 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  41. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  42. 2026-08-30 04:12 UTCEG score recompute
  43. 2026-08-30 04:12 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  44. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  45. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  46. 2026-08-27 21:29 UTCEG score recompute
  47. 2026-08-27 21:29 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  48. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  49. 2026-08-26 23:18 UTCEG score recompute
  50. 2026-08-26 23:18 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  51. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  52. 2026-08-25 21:10 UTCEG score recompute
  53. 2026-08-25 21:10 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  54. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  55. 2026-08-24 21:54 UTCEG score recompute
  56. 2026-08-24 21:54 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  57. 2026-08-23 23:53 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  58. 2026-08-23 01:51 UTCEG score recompute
  59. 2026-08-23 01:51 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  60. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  61. 2026-08-22 03:49 UTCEG score recompute
  62. 2026-08-22 03:49 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  63. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  64. 2026-08-21 05:47 UTCEG score recompute
  65. 2026-08-21 05:47 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  66. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  67. 2026-08-20 07:46 UTCEG score recompute
  68. 2026-08-20 07:46 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  69. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  70. 2026-08-19 09:44 UTCEG score recompute
  71. 2026-08-19 09:44 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  72. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-08-18 11:34 UTCEG score recompute
  74. 2026-08-18 11:34 UTCGHSA enrichmentGHSA-pr44-vh8f-w48v · GitHub CVSS 6.5
  75. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile

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Frequently asked(5)

What is CVE-2026-15714?
CVE-2026-15714 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2026-15714 was made public on July 14, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on July 14, 2026. EchelonGraph's copy of the record carries a last-modified date of July 15, 2026; the record at its source may have been updated since.
Is CVE-2026-15714 actively exploited?
CVE-2026-15714 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15714?
CVE-2026-15714 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15714?
A fix for CVE-2026-15714 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-15714 are linked in the Vendor Advisories panel on this page.

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