CVE-2026-77014

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-08-20. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in libsoup's SoupServer HTTP Range header processing. The sort_ranges() comparator in soup-message-headers.c truncates a 64-bit subtraction result to 32-bit int, flipping the sign for range offsets differing by more than INT_MAX. This causes silent omission of requested byte ranges from HTTP 206 Partial Content responses on resources larger than approximately 2 GB.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
0.2%
EPSS %ILE
12th
KEV
Not listed

CISA SSVCTrack 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 none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 20, 2026

Last Modified

August 25, 2026

Advisory Details (3)

Auto-updated Aug 20, 2026
Patch available. Sources: redhat.
generic

message-headers: Fix Range and Content-Range parsing (!550) · Merge requests · GNOME / libsoup · GitLab

https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/550
redhat

2520143 – (CVE-2026-77014) CVE-2026-77014 libsoup: libsoup: Integer truncation in sort_ranges() comparator causes silent omission of HTTP Range responses

https://bugzilla.redhat.com/show_bug.cgi?id=2520143
redhat Patch Available

CVE-2026-77014 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-77014

Vendor Advisories for CVE-2026-77014(2)

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

Affected Packages

(5 across 3 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: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 22× in last 7d / 99× 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 150 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-77014?
CVE-2026-77014 is a medium vulnerability published on August 20, 2026. A flaw was found in libsoup's SoupServer HTTP Range header processing. The sortranges() comparator in soup-message-headers.c truncates a 64-bit subtraction result to 32-bit int, flipping the sign for range offsets differing by more than INTMAX. This causes silent omission of requested byte ranges…
When was CVE-2026-77014 disclosed?
CVE-2026-77014 was first published on August 20, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77014 actively exploited?
CVE-2026-77014 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77014?
CVE-2026-77014 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77014?
A fix for CVE-2026-77014 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77014 are linked in the Vendor Advisories panel on this page.

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