Bug 2530755 (CVE-2026-87818)

Summary: CVE-2026-87818 GitPython: GitPython: Information disclosure through arbitrary file read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: alinfoot, anthomas, bbrownin, dfreiber, drow, dschmidt, dtrifiro, eglynn, ehelms, ggainey, jburrell, jdobes, jjoyce, jlanda, jmitchel, jpasqual, jpretori, jschluet, juwatts, kaycoth, kshier, lhh, mburns, mdellweg, mgarciac, mhulan, nmoumoul, orabin, osousa, pcreech, rchan, rjohnson, simaishi, smallamp, stcannon, teagle, tmalecek, vkumar, weaton, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in GitPython. This vulnerability allows an attacker to read arbitrary files on the system by manipulating the `--no-index` option in the diff API. By combining this with other options, an attacker can repeatedly query local files to extract sensitive information, such as single-line secrets, based on the application's responses.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-09-09 11:33:09 UTC
GitPython 3.1.59 fails to restrict the --no-index option in the high-level diff API, allowing attackers to read arbitrary filesystem paths as repository operands. Attackers can combine --no-index with -I/--ignore-matching-lines to create a content-dependent Boolean oracle, repeatedly querying local files to recover single-line secrets through distinguishable success or error responses.