CVE-2026-15713

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-07-14. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.9Exploit: None knownExposed: 0

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

A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated attacker acting as a malicious network peer can trick the connection engine into allocating stream states that are subsequently leaked during cleanup. Over a sustained period, this flaw allows the remote attacker to consume the system's heap allocations incrementally, triggering a denial of service (DoS) through an ultimate Out-of-Memory (OOM) application crash.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
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-PGM9867-209) Information Disclosure and Cross-User Credential Leak in SoupSession through SoupCache:get_cacheability() in libsoup/cache/soup-cache.c via Header "`Authorization`and `Cache-Control: max-age=600`" with SOUP_CACHE_SHARED mode (#541) · Issues · GNOME / libsoup · GitLab

https://gitlab.gnome.org/GNOME/libsoup/-/work_items/541
redhat

2499941 – (CVE-2026-15713) CVE-2026-15713 libsoup: SoupCache: libsoup: HTTP/2 frame window exhaustion remote denial of service via memory leak

https://bugzilla.redhat.com/show_bug.cgi?id=2499941
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-15713

Vendor Advisories for CVE-2026-15713(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 17× in last 7d / 83× 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. 2026-08-28 01:53 UTCEG score recompute
  6. 2026-08-28 01:53 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 23:19 UTCEG score recompute
  9. 2026-08-26 23:19 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 19:38 UTCEG score recompute
  15. 2026-08-24 19:38 UTCGHSA enrichment
  16. 2026-08-23 15:58 UTCEG score recompute
  17. 2026-08-23 15:58 UTCGHSA enrichment
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 15:01 UTCEG score recompute
  20. 2026-08-22 15:01 UTCGHSA enrichment
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-21 14:03 UTCEG score recompute
  23. 2026-08-21 14:03 UTCGHSA enrichment
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 12:20 UTCEG score recompute
Show 75 more
  1. 2026-08-20 12:20 UTCGHSA enrichment
  2. 2026-08-19 17:03 UTCEPSS rescore
  3. 2026-08-19 11:23 UTCEG score recompute
  4. 2026-08-19 11:23 UTCGHSA enrichment
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-18 10:18 UTCEG score recompute
  7. 2026-08-18 10:18 UTCGHSA enrichment
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-17 09:20 UTCEG score recompute
  10. 2026-08-17 09:20 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 08:23 UTCEG score recompute
  13. 2026-08-16 08:23 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 07:26 UTCEG score recompute
  16. 2026-08-15 07:26 UTCGHSA enrichment
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 05:49 UTCEG score recompute
  19. 2026-08-14 05:49 UTCGHSA enrichment
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 04:52 UTCEG score recompute
  22. 2026-08-13 04:52 UTCGHSA enrichment
  23. 2026-08-12 13:50 UTCEPSS rescore
  24. 2026-08-12 03:55 UTCEG score recompute
  25. 2026-08-12 03:55 UTCGHSA enrichment
  26. 2026-08-11 13:42 UTCEPSS rescore
  27. 2026-08-11 02:58 UTCEG score recompute
  28. 2026-08-11 02:58 UTCGHSA enrichment
  29. 2026-08-11 00:00 UTCEPSS rescore
  30. 2026-08-10 02:01 UTCEG score recompute
  31. 2026-08-10 02:01 UTCGHSA enrichment
  32. 2026-08-09 13:46 UTCEPSS rescore
  33. 2026-08-09 01:04 UTCEG score recompute
  34. 2026-08-09 01:04 UTCGHSA enrichment
  35. 2026-08-08 16:37 UTCEPSS rescore
  36. 2026-08-08 00:06 UTCEG score recompute
  37. 2026-08-08 00:06 UTCGHSA enrichment
  38. 2026-08-06 23:09 UTCEG score recompute
  39. 2026-08-06 23:09 UTCGHSA enrichment
  40. 2026-08-06 13:46 UTCEPSS rescore
  41. 2026-08-05 22:12 UTCEG score recompute
  42. 2026-08-05 22:12 UTCGHSA enrichment
  43. 2026-08-05 19:17 UTCEPSS rescore
  44. 2026-08-04 21:15 UTCEG score recompute
  45. 2026-08-04 21:15 UTCGHSA enrichment
  46. 2026-08-04 15:10 UTCEPSS rescore
  47. 2026-08-04 10:38 UTCEPSS rescore
  48. 2026-08-03 20:00 UTCEG score recompute
  49. 2026-08-03 20:00 UTCGHSA enrichment
  50. 2026-08-03 10:35 UTCEPSS rescore
  51. 2026-08-02 19:03 UTCEG score recompute
  52. 2026-08-02 19:03 UTCGHSA enrichment
  53. 2026-08-02 02:26 UTCEPSS rescore
  54. 2026-08-01 18:06 UTCEG score recompute
  55. 2026-08-01 18:06 UTCGHSA enrichment
  56. 2026-08-01 04:15 UTCEPSS rescore
  57. 2026-07-31 17:09 UTCEG score recompute
  58. 2026-07-31 17:09 UTCGHSA enrichment
  59. 2026-07-30 16:05 UTCEG score recompute
  60. 2026-07-30 16:05 UTCGHSA enrichment
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-29 14:39 UTCEG score recompute
  63. 2026-07-29 14:39 UTCGHSA enrichment
  64. 2026-07-28 15:36 UTCEPSS rescore
  65. 2026-07-28 13:41 UTCEG score recompute
  66. 2026-07-28 13:41 UTCGHSA enrichment
  67. 2026-07-27 14:13 UTCEPSS rescore
  68. 2026-07-27 12:44 UTCEG score recompute
  69. 2026-07-27 12:44 UTCGHSA enrichment
  70. 2026-07-26 14:54 UTCEPSS rescore
  71. 2026-07-26 14:54 UTCEPSS rescore
  72. 2026-07-26 11:42 UTCEG score recompute
  73. 2026-07-26 11:42 UTCGHSA enrichment
  74. 2026-07-25 14:17 UTCEPSS rescore
  75. 2026-07-24 14:17 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-15713?
CVE-2026-15713 is a medium vulnerability published on July 14, 2026. A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated…
When was CVE-2026-15713 disclosed?
CVE-2026-15713 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-2026-15713 actively exploited?
CVE-2026-15713 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 55.7% of all scored CVEs.
What is the CVSS score of CVE-2026-15713?
CVE-2026-15713 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-15713?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15713, 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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