CVE-2026-12547

LOWPre-NVD 3.43.4
EchelonGraph scoreMEDIUM confidence

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

Score 3.4 from GitHub Security Advisory (severity: LOW) published 2026-07-21. A secondary CVSS source baseline 3.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-46361 (ENISA EUVD) · GHSA-gmf9-8jmv-v2q8 (GitHub Security Advisories)Source: ENISA EUVD

3.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 3.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.

CVSS v3
3.4
EG Score
3.4LOWmedium confidence
EG Risk
15
EG Risk 15/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity34% × 45%
Impact severity (EG Severity): CVSS 3.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (3.4): severity, escalated by confirmed exploitation. This CVE's 3.4 is its impact severity (EG Severity), not escalated.

EG Severity
3.4 LOWCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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 21, 2026

Last Modified

October 24, 2026

References (3)

Vendor Advisories for CVE-2026-12547(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 / 46× 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 140 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 40 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-25 14:49 UTCEG score recompute
  5. 2026-10-24 19:27 UTCEG score recompute
  6. 2026-10-24 19:27 UTCVendor advisory
  7. 2026-10-24 19:27 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  8. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-10-18 05:04 UTCEG score recompute
  16. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-12 16:36 UTCEG score recompute
  22. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-10-11 20:12 UTCEG score recompute
  24. 2026-10-11 18:24 UTCEG score recompute
  25. 2026-10-11 14:57 UTCEG score recompute
Show 75 more
  1. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  6. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-10-04 14:48 UTCEG score recompute
  10. 2026-10-04 14:48 UTCVendor advisory
  11. 2026-10-04 14:48 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-10-01 07:42 UTCEG score recompute
  15. 2026-10-01 07:42 UTCVendor advisory
  16. 2026-10-01 07:42 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  17. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  19. 2026-09-28 06:08 UTCEG score recompute
  20. 2026-09-28 06:08 UTCVendor advisory
  21. 2026-09-28 06:08 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  23. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-09-23 07:31 UTCEG score recompute
  25. 2026-09-23 07:31 UTCVendor advisory
  26. 2026-09-23 07:31 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  27. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  28. 2026-09-20 05:57 UTCEG score recompute
  29. 2026-09-20 05:57 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  30. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  31. 2026-09-16 12:38 UTCEG score recompute
  32. 2026-09-16 12:38 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  33. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  34. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  35. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  36. 2026-09-12 13:02 UTCEG score recompute
  37. 2026-09-12 13:02 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  38. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  39. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  40. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  41. 2026-09-09 11:28 UTCEG score recompute
  42. 2026-09-09 11:28 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  43. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  44. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  45. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  46. 2026-09-05 08:47 UTCEG score recompute
  47. 2026-09-05 08:47 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  48. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  50. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  52. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  53. 2026-08-30 02:14 UTCEG score recompute
  54. 2026-08-30 02:14 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  55. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  56. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  57. 2026-08-26 02:10 UTCEG score recompute
  58. 2026-08-26 02:10 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  59. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  60. 2026-08-23 00:34 UTCEG score recompute
  61. 2026-08-23 00:34 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  62. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  63. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  64. 2026-08-19 23:01 UTCEG score recompute
  65. 2026-08-19 23:01 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  66. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  67. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  68. 2026-08-16 21:27 UTCEG score recompute
  69. 2026-08-16 21:27 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4
  70. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  71. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  72. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  73. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  74. 2026-08-13 19:53 UTCEG score recompute
  75. 2026-08-13 19:53 UTCGHSA enrichmentGHSA-gmf9-8jmv-v2q8 · GitHub severity LOW · GitHub CVSS 3.4

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-12547?
CVE-2026-12547 is a low-severity vulnerability; its CVE record was published on July 21, 2026. SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.
When was CVE-2026-12547 made public?
CVE-2026-12547 was made public on April 25, 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 21, 2026. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-12547 actively exploited?
CVE-2026-12547 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12547?
CVE-2026-12547 has a CVSS base score of 3.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-12547?
A fix for CVE-2026-12547 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12547 are linked in the Vendor Advisories panel on this page.

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